Tears are the fluid secreted by the lacrimal gland. They are almost completely (up to 99%) composed of water. The rest is inorganic substances: sodium chloride (this is the basis of table salt - hence the salty taste of tears), calcium sulfate and phosphate, sodium and magnesium carbonate.
Also in tears there is lysozyme, an enzyme due to which they have antibacterial properties, and oleamide, which forms the basis of an oily layer that does not allow moisture to evaporate.
They perform several important functions. Tears supply the cornea of the eye, on which there are no blood vessels, with all the necessary nutrients, cleanse the surface of the eyeball from foreign particles and maintain the normal functioning of the organ of vision.
Tears that are released to moisten and protect the eyes are called reflex, or physiological. And those that are associated with any experiences are considered emotional. Scientists have long established a neural connection between the lacrimal glands and the region of the brain responsible for emotions.
So crying is part of what makes us human.
Animals definitely produce physiological tears. It is believed that our smaller brothers cannot experience emotions close to human ones. So, they do not cry from experiences. But the further scientists explore this topic, the more they are convinced that not everything is so simple.
For example, University of Colorado professor emeritus Marc Bekoff mentioned Do Elephants Weep as an Emotional Response? about scientific studies that confirm that elephants and other animals can cry in response to emotional turmoil. In his opinion, this issue requires a deeper study.
Crocodiles really cry during the meal. But not because they allegedly feel sorry for the victim. Tears are released due to an excess of salts in the body of alligators. And the process of absorption of food mechanically activates their release.
Turtles, iguanas, sea snakes cry in the same way.
American biochemist William Frey (William Frey) found out that emotional tears are chemically different from physiological tears caused by irritation from caustic onion fumes. It turned out that the former contains more proteins. Frey suggested that in this way the body gets rid of chemicals, the release of which provoked.
That is why emotional tears are more viscous, they are better visible on the skin. They may also contain stress hormones and other substances found in excess in the body, such as manganese.
Studies show that people with stomach ulcers and colitis (typical stress-related illnesses) tend to cry less often than people without the condition.
Ed Vingerhoets, a professor at Tilburg University, after a long study of the issue, concluded that immediately after crying, many people feel worse. But after an hour and a half, their emotional state stabilizes. And then it gets better than it was before they started crying.
Lauren M. Bylsma of the University of Pittsburgh found out When is crying cathartic?: An international study. that people are more likely to feel better after crying that was caused by positive emotions, or if tears helped to understand and realize something.
If tears are caused by suffering or a person is ashamed of crying, he will feel worse.
Also, the state will depend on the witnesses of the crying. Those who shed tears alone or in the presence of one person (especially if it was a close person who was ready to support) felt better than those who cried in front of two or more people.
Crying is the body's response to stress. And it can be caused by both negative and positive emotions. It doesn't matter what feelings caused crying. Tears help the body recover faster from stress.
Mostly with the common stereotype that crying is a sign of weakness. Therefore, they simply try not to show tears in public. Surveys show that they actually cry a lot more than they think. Just no witnesses.
The lack of tear-related restrictions in the weaker sex may be one of the reasons why women, on average, live longer than men. More crying, less stress.
Scientists suggest that hormones influence the frequency of crying. Testosterone can suppress crying, and the female hormone prolactin most likely provokes it.
And one more important nuance. Dianne Van Hemert, Ph.D., senior research fellow at the Netherlands Organization for Applied Research, found that people in more prosperous countries may cry more often because it is not frowned upon by society.
The lacrimal glands of a healthy person usually produce from 0.5 to 1 milliliter of tears per day (an average of half a glass per year). Stress increases their number, and some diseases reduce them.
For example, dry eye is characteristic of Sjögren's syndrome, an autoimmune disease. Scientists have found that such patients suffer not only from the discomfort associated with the eyes. It is often more difficult for them to understand and express their feelings and emotions, resolve conflicts, and establish contact with others. This once again proves the importance of tears and crying.
If there is such an opportunity, it is better not to hold back the tears. Don't rub your eyes, don't cry on your face into the pillow, apply a cold compress to your eyelids. All this will help to quickly put yourself in order.
Chemistry of emotions
Have you ever wondered why crying calms us down? Scientists have found that brings relief not an emotional discharge caused by sobbing, but... chemical composition of tears. They contain stress hormones released by the brain at the time of the outburst of emotions. Lacrimal fluid removes substances from the body that are formed during nervous overstrain. After crying, a person feels calmer and even more cheerful.
But people who are depressed for a long time are less likely to burst into tears than everyone else. The longer the depression, the less often the episodes of "tearful mood", which, in turn, is a sign of numbing emotions one of the most common psychological diseases. Scientists explain it this way: tears are a kind of signal, a call for help, which, after several months of hopeless longing, dries up. By the way, a crying person uses 43 facial muscles, while a laughing person has only 17. It turns out that more wrinkles from tears than from laughter.
remedy
Our ancestors - the ancient Slavs - had curious custom: married women collected their tears in special vessels, and then mixed them with rose water and used to treat wounds. By the way, the women of Byzantium and Persia did the same, who have long noticed that tears have an amazing the ability to heal wounded soldiers.
The secret is that in the tear fluid is antimicrobial protein lysozyme, which successfully neutralizes bacteria and prevents them from causing dangerous infections. That is why in fairy tales the power of “living” water is attributed to tears: after crying for three days and three nights over the deceased lover, the beauty most magically returned him from the kingdom of the dead.
Miracle lenses
And ophthalmologists believe that tears we need in order to ... see better: the tear film on the cornea, constantly renewed by the flow from the lacrimal gland, ensures the sharpness of our vision. It can be compared to a water lens, which was equipped with a kinescope on an old TV.
Tears also play a vital role in lubricating the eyeball and cleansing it of irritants. In addition, in addition to antibacterial agents in tears contains oxygen and nutrients for the cornea of \u200b\u200bthe eye that does not have its own blood supply.
So that the tear fluid does not stagnate, but spreads evenly, the eyelids periodically close. Blinking, a person, like all land animals, wets the surface of the eyeball, otherwise it will dry out. Turns out that eyes crying all the time. In order to produce this amount of fluid, the lacrimal glands work around the clock.
Bitter and salty
Some especially sensitive people admit that sometimes they are embarrassed to watch a movie in a company, listen to music in a concert hall, being afraid to seem overly sentimental. According to the results of a German survey, cry at what you see, read, heard works of art characteristic of 71% of women and 40% of men.
It's funny, but these so-called bright tears shed much more often than bitter - from the sad events of real life. The fluid that is formed in this case, although it does not remove harmful substances from the body, but softens the action of adrenaline, the amount of which increases sharply when excited. Exactly the same mechanism explains the tears that flow from unrestrained laughter. At the same time, the salinity of the most bitter tears - from pain and from despair - is only 9% of ocean water. Tears that well up in the eyes when we peel an onion, drink too hot tea or clean a mote from our eyes are more insipid.
Dry eye syndrome
When the tear film does not envelop the cornea enough or becomes thin in a separate place, the nerve endings immediately signal us: it seems as if a mote has entered the eye. The eyes are red and inflamed.
Sometimes the lack of tears is due side effect of certain medications- antihistamines and antidepressants. Many oral contraceptives also lead to dry eye syndrome. Almost always, tear production decreases during menopause, but with the onset of menopause, this process normalizes.
Tearing decreases with age: 20% of people over 55 suffer from dry eye. Very tangible inconvenience is also felt by those who, after sitting up at the midnight vigil at the computer, complain of a “dry” pain in the eyes. There is not enough tear fluid in the rooms where the air conditioner is working.
Dry eye syndrome affects almost everyone who wears contact lenses. Dries the eyes and blepharoplasty is a cosmetic surgery to tighten senile skin on the eyelids.
In all these cases, it is necessary to purchase drops and ointments in pharmacies that contain artificial polymers that lubricate the surfaces of the eyes and partly cope with other important functions performed by tears. Whatever one may say, but without tears - nowhere!
Interesting
It is believed that with and without 2-3 times a month cry 74% of women and 20% of men. True, the latter will never admit this weakness. 36% of women and 25% of men cry from pain. From love and related experiences 41% women and 22% men. Why are ladies more willing to shed a tear? It turns out that the point is not in masculinity or femininity, but in the biochemistry of the male and female organisms. The weaker sex is more tearful due to the hormone prolactin contained in the blood, which is responsible not only for the ability to let out a tear, but also for the production of milk during breastfeeding. The hormone testosterone prevents men from swallowing tears, which prevents the accumulation of tear fluid.
By the way
How babies cry. Having not yet learned to speak, the baby is fluent in the language of crying. Truth, babies cry without tears. In babies, the lacrimal glands function from birth, but they produce little fluid - it is only enough to moisten the eyes and protect them from infection. Having become older, the child already resorts to real tears, with the help of which he relieves emotional stress.
Many people have heard that crying is good for you. This hypothesis has been repeatedly confirmed by scientifically proven facts. The main function of tears is - they allow a person to see.
Literally. Tears moisturize the eyeballs and eyelids, prevent dehydration of various mucous membranes. Lack of lubrication means no vision. Writes Jerry Bergman: "Without tears, life would be radically different for people, and vision would be completely lost."
Human's own antibacterial and antiviral agent, these are tears, they have many positive functions:
Crying is also useful in various stressful situations. In this case, this function helps to relieve stress. People who cry during nervous tension feel much better. Their emotional health is higher, it is easier for them to survive all the difficult moments in life.
Biochemist William Frey, who studied this function of the body, found that emotional tears - those that occur in trouble or grief - contain more toxic by-products than tears of irritation. They remove toxins from the body, accumulated due to stress. They are similar to natural therapy or a massage session.
Answering the question as to whether it is good to cry when stressed? The answer is yes, crying is quite useful and helps to restore the emotional and physical health of a person.
Experienced psychologists tell in detail why it is useful to cry. Their explanations allow you to get a clear picture of what the usefulness of this emotion is and how it affects the general condition of a person. Scientists say that tears in people arose as a tool of self-defense.
They moisturize the mucosa and are used as a means of survival. Evolutionary biologist Oren Hasson suggested that humans use tears to show others that they are vulnerable.
When most people see a crying face, they are tempted to ask what is wrong, offer help or empathy. Emotional tears are indicative of a person's willingness to trust and become connected to supportive communities.
Men have this kind of emotion. At this moment they open their inner world and release negative emotions. Is it good to cry? The answer is yes, it should be done at least occasionally. Otherwise, there is a high probability of developing psychological disorders and serious stress. It is important to always remember this, and try to periodically show such emotions.
And this can be done without anyone's presence.
It makes 9 out of 10 people feel lighter, reduces stress, and may help keep the body healthy. This kind of emotional release is free, available to almost everyone, and has no known side effects other than red eyes and liquid makeup.
Crying is not itself
The second best anti-stress remedy, but recent studies show that it is very effective in healing, and that it improves the mood of 88.8% of respondents, and only 8.4% feel worse. So useful that researchers suggest that everyone who finds themselves in a difficult life situation should cry well and they will feel better, this activity is useful for women.
Laughter and anger have their benefits. Laughter has been shown to promote:
But what are useful tears? Emotional tears come from the same lacrimal glands that produce the fluid that forms a protective film over the eyeballs. As a result, the organ gets the opportunity to get rid of irritants, releases excess fluid when the eye becomes irritated or a foreign body enters it.
Therefore, if a girl suddenly burst into tears, you should not immediately be scared, maybe a mote got into her eye.
The phenomenon supports the so-called recovery theory that emotional tears and their contents are one way to bring the body back into balance after a stressful event. The concentration of chemicals harmful to a person increases during emotional stress, and can be removed from the body with the help of tears. That is, when a person cries in difficult situations for him, he frees his body from harmful toxins and emotions. Since unavoidable stress can increase the risk of a heart attack and damage certain areas of the human brain, people's ability to cry has a survival value.
Other evidence supports the theory. Emotional tears have been shown to have higher levels of certain proteins, manganese and potassium, and hormones, including prolactin, than simple tearing due to an object in the eye or irritation. Manganese is an essential nutrient that prevents slow blood clotting, skin problems, and cholesterol levels. Potassium is involved in nerve function, muscle control, and blood pressure.
Prolactin is a hormone involved in stress and plays a role in the immune system and other bodily functions. His involvement in tears may help explain why women cry more than men.
Women have more prolactin than men, and levels rise during pregnancy, when the frequency of crying among women increases significantly.
Is crying bad or good? There are many more useful properties, especially in stress and various emotional situations. It is important to note that crying is also useful during pleasant moments. In this case, it has almost the same beneficial properties as tears caused by stress.
There have been claims that crying can reduce pain, although there is little research in this area.
The counter-theory is that tears don't do much to help the body recover from whatever caused them. This increases arousal to stimulate behavior that can help avoid the threat. In support of this theory, studies show that skin sensitivity increases during and after crying, and breathing deepens.
A study done at Tilburg University in the Netherlands shows that both men and women will provide more emotional support for someone who cries, although they are less positive about someone who is crying.
Another study found that men liked it best when they cried, and women when they didn't. The results support the theory that crying is an attachment behavior designed to get help from others.
I want to cry? Crying is good for your health. We are all subject to various emotional stresses and crying is an effective form of stress relief. Crying is an emotional response to pain, despair, fear, and sometimes happiness and joy, some people love to cry, others hold back tears. Tears are full of sodium and chlorine.Removing them from your head makes you feel better. Crying is a natural human emotion. Today, most of us are burdened with an endless amount of personal, professional, and social responsibility. The question here is without shedding tears, how to make us feel better? Of course, running away from problems and responsibilities. But crying can help you a little here. In fact, in some cases, our stress level reaches a certain point where crying comes naturally to us. So let's take a look at some of the physical and emotional benefits associated with crying.
Crying is a good healer
Crying reduces stress
Experts believe that crying can help us reduce our stress levels to a great extent. It is a well-documented fact that the act of crying helps get rid of unwanted hormones and chemicals that are responsible for creating tension in human beings, so there is no point in holding back your tears.
Crying prevents disease
Interestingly, crying is also a means to prevent colds and flu. Not many people know that tears help us fight germs that get into our eyes. The fact is that tears are able to kill 95% of the bacteria present in our eyes within a few minutes, and in the process prevent diseases.
Crying is also believed to promote good eyesight. When we cry, tears flow from our eyes, thus moistening the eyes and thus preventing dehydration of the membrane surrounding our eyeballs. Thus, it promotes clear vision.
Too many tears
However, crying often is not always a good thing and can be a sign of more serious illnesses such as depression, post-traumatic stress disorder, and postpartum depression.
Moreover, the healing effects of crying will not work for everyone.
Researchers have found that people who suffer from mood disorders are less likely to feel better after crying.
If you're depressed and cry all the time, that's not good and it might be time for you to seek help.
We all have a natural body function that helps relieve stress, you know what I'm saying. It is also the natural function of the body to remove the accumulation of heat in your body and this is called sweat. You have a natural body function to relieve stress, anxiety, and other emotional buildups, and that's called crying. Yes, cry.
I want to cry? You must afford it. It's a form of stress relief where you really kind of exhale. Let tears well up in your eyes, or roll down your cheeks, or just burst into sobs. Choose a place where you won't be disturbed and cry. Of course, you may experience crying side effects such as puffy eyes, runny nose. Just remember to use a cold compress to control eye swelling. If you don't, your eyes may remain swollen for hours. After a thorough crying, maybe even screaming, you will feel better. You know what to do if - cry. Sometimes crying helps clear your mind, and it can even help you think things through a little more clearly than if you kept those stressful emotions inside. I'm sure there are naturally other ways to relieve stress, exercise, sex, sleep, massage, baths, but don't ignore or deprive yourself of a good cry - an immediate and effective form of natural stress relief.
Most of us associate tears with sadness, anger, joy, or even laughter. All these are strong emotions that are caused by certain actions or circumstances. What if you found out that crying is also beneficial? What is the effect of tears on health and what are their benefits?
According to statistics, women cry 47 times a year, while men - only 7. In any case, these facts indicate that it is sometimes useful for all of us to shed a tear.
We cannot ignore the fact that tears can be a relief. It helps to reduce anxiety levels, relieve stress and tension, and clear the mind. The longer we hold on to emotions, the more likely it is that things will explode at some point. According to studies, 88.8% of people feel better after crying, and only 8.4% feel worse.
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Tears are useful at certain times, because they allow you to track your every emotion. Thus, it serves as proof that you are really happy, funny or funny. Tears intensify emotions and make them more vivid.
Like all fluids that leave our body, tears help get rid of toxins. When we cry, they carry away with them some of the chemical compounds that appear due to emotional stress.
Tears pass through the nasal passage where they come into contact with mucus. If there is accumulation here, then tears can loosen it and clear the nose.
Studies have shown that crying can lower blood pressure and heart rate.
Our eyeballs need constant lubrication to protect them from dust and bacteria. Tears serve as an additional factor that affects this process.
Coming into this world, we first of all learn to cry, and only then to laugh. Our first tears become a mechanism for influencing the adults around us. It is with the help of tears that we notify them that we are hungry, tired or want to sleep. And, sometimes, we manipulate with tears and achieve that we, small children, are taken in our arms. We are getting older, growing up and we already have other ways of expressing feelings and desires. Ah, tears? We begin to be ashamed of them and cry less and less. In the world of adults, such a manifestation of feelings is called weakness. Therefore, by pushing emotions inward, we learn to control ourselves.
But, there are also tears of joy, in special and touching moments of life ...
Today we will talk about tears, About, what are tears what they are and try to answer the most important question - whether it is beneficial or harmful to express one's feelings in such a "tearful" way...
Do you know that crying is also possible in different ways? Scientists divide tears into two types - reflex (mechanical) and emotional. Now we will consider each of these types in more detail.
reflex tears- this type of tears is quite functional, as it moisturizes the mucous surface of the eye, cleanses it, protects it from friction and irritation, and from environmental influences - dust, litter, wind. Remember, a cold autumn day, the wind that blows your face - tears well up in your eyes, but not at all because you are so imbued with the autumn landscape. It is noteworthy that this type of tears is also found in animals. One of the main biological features of the lacrimal glands and ducts is their peculiarity, when a pain signal enters the human brain, to secrete active substances together with tears, which accelerate the healing processes of bruises and wounds.. So, if you hurt yourself - do not be ashamed of your tears, but start recovery programs in your body. In addition, scientists have already officially proven that people who let go of tears are less likely to suffer from cardiovascular diseases. But, the trouble is, the older we get, the less often our eyes are moistened with such reflex tears. With age, this ability to secrete mechanical tears gradually disappears, which is why the eyes of old people look dull and seem to have lost their color pigment.
emotional tears- this is the result of our experiences. Interestingly, such a reaction to positive or negative incidents is inherent only in humans. In psychology, there is even a special term - " adaptation". So, emotional tears help a person to adapt to the situation, to accept what happened, it is easier to endure stress. Such tears help to cope not only with mental, but also with physical pain, they have a special bactericidal property and are able to stimulate the production of breast milk in a nursing mother. These tears contain a lot of protein. According to psychologists, and who, if not them, should know everything about the nature of this phenomenon - most often people cry still from grief, less often from happiness. But other emotions do not cause such manifestations of feelings in people.
Ninety-nine percent of tears are water, and one percent are inorganic substances such as sodium chloride and carbonate, magnesium, calcium phosphate and sulfate, and protein.
Scientists have already proven the fact that during crying, along with tears, harmful chemicals and so-called stress stimulants are removed from our body in such an original way - catecholamines. Catecholamines are especially dangerous for a young and growing organism. That is why both children and adolescents cry so often - they not only give vent to their emotions, but also trigger natural defense mechanisms that help protect both physical and psychological health. The human body produces a glass of tears every day!
So we have come to the moment when we can already answer our main question - but for health Is crying good or bad?
It turns out that it all depends on what you are crying about! Let's start with reflex tears- such a physiological feature has a beneficial effect on our eyes and protects the delicate surface of the mucous membrane of the eye from damage. In addition, another feature of our body - after tears, we breathe deeper and more evenly, and our body is in a relaxed state. What about emotional tears? Most psychologists tend to think that cry - you can and should. Such tears help to cope with a stressful situation and literally quench the pain. As a rule, after such tears comes emotional relief. In addition, while crying, you get rid of harmful chemicals, your blood pressure normalizes. So holding back your tears is not a thankful thing. People who do this are prone to mental and nervous disorders.
Another explanation why women live longer than men is their emotionality and ability to cry. Men push their emotions deep, because someone said that men do not cry, such constant stress undermines their health and leads to early death. And here, women who cry five times more often, giving vent to feelings, emotions and tears, live longer by an average of six to eight years than reserved men.
But, do not rush to cry with or without reason. In addition to the fact that those around you may simply misunderstand you, you can subject your nervous system to a strong load and everything can end in a real nervous breakdown. Oh, and crying won't help you.
In addition, scientists argue that such a concept as the benefits and harms of tears are purely individual for each person - some tears help, and they really feel better, while others, on the contrary, feel emotional devastation after tears. And, to whom emotional tears are categorically contraindicated - these are people with an unbalanced psyche and suffering from anxiety syndrome.
Another feature of tears is that if we are sympathized while crying, we shed tears longer, but we usually feel better after such tear therapy ...
Yes indeed, you can forget the one with whom you laughed, but you can never forget the one with whom you cried ...
Let tears be in your life only for happy occasions and for joy, and after such tears it becomes light and easy in your soul.
So what are tears?
Ludmila Palikhova
Small children often cry, and this is considered normal. How else can a baby tell his parents about his desires? So she cries when she wants to eat or experiences some kind of inconvenience.
Their main task is that, in response to a pain signal, the lacrimal glands begin to secrete biologically active substances that accelerate the healing of wounds or bruises. So, if you hurt yourself, cry for your health - it will heal faster.
julia_sweet
If you are in terms of the fact that a person cries from troubles, grief and misfortune, then crying is harmful, But troubles cannot be avoided in our life, therefore “crying” is a protective function of the body against stress, a person gets rid of fluid and salt, which reduces pressure and soothes the soul. Crying means to relieve the soul. In this regard, crying is more useful than remaining with grief inside the soul. And crying with a sympathetic person will be even more useful, because shared grief will be easier.
Marina Lebedeva
Why do tears sometimes well up for no reason, even if everything is fine? How does a blind rain of tears turn into a downpour?
This is because the body feels the need for a little stress; weeping, we pat on the cheeks our nervous system, numb in inactivity.
The lacrimal mechanism was formed in humans in the process of natural selection. Those who cried - survived. From the first days of life, a person uses crying as an opportunity to tell others that he feels bad, that he lacks something. The ability to cry does not appear in a person immediately, but at 5-12 weeks after birth.
That is, much earlier than laughter, which occurs at about five months. Research has shown that children with conditions that make it difficult for them to produce tears when they cry are often unable to cope with emotional stress. Crying, the child trains the lungs, strengthens the protective properties of the membranes (the lacrimal glands secrete the enzyme lysozyme and moisten them), and also puts the nervous system in order.
Scientists have long been studying the "tear" phenomenon. They found that up to the age of 12, all children cry, and after that, mostly girls. And it's not just that women often use tears as a weapon, a means of diplomacy and the last argument in trying to get what they want. The main culprits are hormones. In men, the level of hormones is little subject to fluctuations, while in women it changes all the time, which is reflected in the physical and mental state.
So what are tears?
Tears are not an ordinary transparent liquid with a salty taste, but one of the very important functional elements of our body. Our body produces about half a liter of tears per year. Tears are physiological - reflex tears, necessary for moisturizing and cleansing the eyes, and emotional - tears that occur as a reaction to an emotional shock.
A tear contains not only water, but also proteins and carbohydrates, and in order not to linger on the surface of the skin, it is covered with a thick oily film. Reflex tears moisten the surface of the eyes, serve as a reaction to irritation and are necessary for normal vision. During the day, a person releases one milliliter of salutary tear fluid.
Moreover, the secret of the eye gland contains psychotropic drugs that reduce feelings of tension and anxiety. It is for this reason that when we feel overworked, angry or afraid, we sometimes prefer to feel sorry for ourselves and cry a little. As a result, we become much better. But you should not abuse such a means of relaxation - from regular sobbing, loved ones will feel uncomfortable, moreover, such promiscuity can lead to complex nervous diseases.
Statistics show that women live longer than men - they are less conceited, more emotional, their body tolerates stress better. In a man from childhood, firmness of character is brought up, they are inspired that it is a shame to cry. As a result, restraining themselves and accumulating negative emotions, men suffer from gastrointestinal ulcers, hypertension and cardiovascular diseases ten times more than women.
So, a woman cries out 5 milliliters of tears at a time, and a man only three. In addition, the accumulation of negative emotions leads to severe disorders of the nervous system, to depressive states, the way out of which some seek in suicide. As a result, statistics indicate that in all age categories suicides are much more among men.
Objectively, tears have much more pluses than minuses. In response to stress, the body produces very harmful substances - leucine-enkephalin and prolactin. They have a destructive effect on the body, and they can leave it only with tears. With tears, toxins are removed from the body.
Tears normalize blood pressure, have anti-stress and antibacterial effects, promote healing of injuries. Thanks to tears, the skin under the eyes stays young longer.
Link article
Natalya Bichevskaya
In response to stress, the body produces very harmful substances - leucine-enkephalin and prolactin. They have a destructive effect on the body, and they can leave it only with tears. With tears, toxins are removed from the body.
Natasha
Is it good to cry?
Small children often cry, and this is considered normal. How else can a baby tell his parents about his desires? So she cries when she wants to eat or experiences some kind of inconvenience.
But when the child grows up, crying becomes already an indecent occupation, even if he fell and badly hurt his knee. In such cases, the boy is told: "Don't cry, be a man." For a girl, for example: “Be smart” or something else so instructive. Of course, such exhortations do not reassure anyone. Most often, the child continues to sob. And he does it right.
Doctors have noticed that tears not only relieve suffering, they also heal. According to scientists, in the body of every person, in addition to the immune system, there is also another protective system that is specifically designed to heal a wide variety of injuries: abrasions, bruises, etc.
This system, in turn, cannot operate in isolation from the nervous system. But how does the nervous system know about the damage? Of course, through pain. The pain signal "gives the command" to turn on the defense system and eliminate the damage, that is, to begin to treat it.
But why cry then? Of course, tears can not be shed. But even if a person does not cry when he is in pain, tears still well up in his eyes. But this is only an external manifestation of the work of the lacrimal glands.
Their main task is that, in response to a pain signal, the lacrimal glands begin to secrete biologically active substances that accelerate the healing of wounds or bruises. So if you hurt yourself, cry for health - it will heal faster
Valentina
At first glance, tears are an ordinary clear liquid with a salty taste. In fact, this is a whole chemical plant. Inside the tears are water, proteins and carbohydrates. And it is covered with a thick oily film ... if tears drip from the eyes, this is clearly no coincidence. They moisturize the surface of the eyes, serve as a reaction to irritation and are necessary for normal vision. Psychologists unanimously say that crying is good. Tears normalize blood pressure and have an anti-stress effect. But people who are not prone to sentimental tears are considered unfortunate by doctors. So watching melodramas can be considered a prevention from all misfortunes.
It is useful to cry - tears cleanse the eyes, they become clean and trusting.
Scientists at Moscow State University once proved that tears contribute to the relief of injuries.
In experimental rats, which were artificially forced to cry, irritating the mucous membranes of the eyes, the wounds healed twice as fast. 
