Why do we cry when we are sad when tears clean your eyes?
814403
its because when we are sad our facial muscle's shape become  distorted therefore squeezing the tear glands..
282837
Brew green tea bags, ice them and put them on your eyes. They work for me. Or try a cold cream that is designed for eyes. Make sure you keep your eye cream cold (like in the refrigerator). These two things work for me, but my guess is nothing much is going to work because when you cry you really raise those blood vessels by expanding them from over-working your tear ducts. Most remedies are designed to help natural eye puffyness..not excessive work outs of the eye. Hope you don't need this--because you stop crying :)
638924
It could Be that either:\n\n1) your eye has excreted waste (greeney/yellow crsuty substance sometines kown as 'sleep') and has excreted too much therefore glueing your eye shut.\n\n2) Your eyes atre beginning to weep becuase you have hayfever, if so buy some Antihistemine tablets and take 2 a day and that should keep it at bay
635103
Tears are a liquid produced by the body's process of lacrimation to clean and lubricate the eyes. The word lacrimation may also be used in a medical or literary sense to refer to crying.\n\nThere are three basic types of tears:\n\nBasal tears: In healthy mammalian eyes, the cornea is continually kept wet and nourished by basal tears. They lubricate the eye and help to keep it clear of dust. Tear fluid contains water, mucin, lipids, lysozyme, lactoferrin, lipocalin, immunoglobulins, glucose, urea, sodium, and potassium. Some of the substances in lacrimal fluid fight against bacterial infection as a part of the immune system. \n\nReflex tears: The second type of tears results from irritation to the eye by foreign particles, or substances such as onion vapors or tear gas or pepper spray. These reflex tears attempt to wash out irritants that may have gotten into the eye. \n\nCrying or weeping: The third category, also referred to as crying or weeping, is increased lacrimation due to strong emotional stress or pain. This practice is not restricted to negative emotions; many people have been known to cry when extremely happy. In humans, emotional tears can be accompanied by reddening of the face and sobbing — cough-like, convulsive breathing, sometimes involving spasms of the whole upper body. Tears brought about by emotions have a different chemical make up than those for lubrication.
706357
you could very much cry underwater \none way could be that you are wearing a mask and your tears will go in the mask\nthe scond way  if you are not wearing a mask is tht yiou can still cry but you just wont see the tears
617979
put a cold cloth on eyes before you go to bed and when you get up in the morning, if you could sleep, i know when i cry i cant sleep and that makes it worse. boohoo
34410
The first question would be are you taking any meds? Some meds can cause sensitivity to light. Eyes tear for several reasons... To clear out foreign objects.2 over active tear ducts..3 supply moisture. Try taking an antihistamine. If it is a worry to u you should consult a doctor
213045
There are two basic reasons why eyes water.  Eyes can water if the tear ducts are blocked.  You can have surgery to solve this problem but sometimes the results are less than completely successful.  Tears are also a reaction to something irritating the surface of the eyes.  The irritation can be allergy, air pollution, infection, scratches on the surface of the eye, and even dry eye.
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On the Origin of Crying and Tears\n\n \n\nHuman Ethology Newsletter, Vol. 5 Issue 10, june 1989, p. 5-6\n\n \nSummary\n\nCrying and tears may be favored by natural selection because they bring about helping behaviour by the spectator. This helping behaviour is explained by the assumption that crying and tears “imitate” some of the perceivable characteristics of a baby that has just been born (e.g., wet face, facial expressions, respiratory sounds). If human parents and people in general are “programmed” by evolution to feel the need to help and protect when they see (and hear) newborns, then when nonneonates are in need, the appearance and the behavior that together show resemblance to the neonate may have survival value at some essential points during phylogeny and, thus, may spread in the human species.\n\nIn ontogeny, the fact that the shedding of tears usually occurs for the first time not until weeks or months after birth is not an argument against this view but, rather, supports it.\n\n \n\nSome Theories Regarding the Function of Emotional Tears.\n\nIn The Expression of Emotions in Man and Animals, Charles Darwin listed three reasons for the secretion of tears: “The primary function of the secretion of tears, with some mucus, is to lubricate the surface of the eye, and a secondary one, as some believe, is to keep the nostrils damp, so that the inhaled air may be moist, and likewise to favour the power of smelling. But another, and at least equally important function of tears is to wash out particles of dust or other minute objects which may get into the eyes” (Darwin, 1872: 169). In Darwin’s view, the excretion of emotional tears was related to the first function.\n\nIn more recent years, A. Montagu (1959) offered another explanation of emotional tears: The intake and expulsion of air that occurs in sobbing would cause the sensitive mucous membranes of the nasopharynx to dry out quickly if tears did not keep them moist, and as a result, the risk of infection would increase. This explanation was criticized by W.H. Frey (1982:9) who wrote: “Humans do not excrete tears while running or performing other exercise where breathing is increased.” He hypothesized that, like urinating, defecating, and exhaling, emotional tearing may be involved in the removing of waste products or toxic substances from the body. Perhaps people feel better after crying because as they shed tears, they also shed, in those tears, chemicals that build up during emotional stress.\n\nThese explanations are essentially physiological, and Darwin made explicit that he assumed no other, more fundamental reason for weeping. He wrote: “…we must look at weeping as an incidental result, as purposeless as the secretion of tears from a blow outside the eye, or as a sneeze from the retina being affected by a bright light, …” (Darwin, 1872: 176-177). In his view, the sole effect of weeping or crying is to give relief to individuals who are experiencing the agony of pain.\n\nIn contrast to Darwin’s point of view, the explanation that follows directly links crying and the secretion of tears to evolutionary theory. Crying and the emotional secretion of tears are considered here to be messages that contain a request for help, and humans have the ability to cry and to shed tears because these messages have proven to be effective.\n\n \n\nAn Evolutionary Explanation of Crying and Tears.\n\nThis explanation is based on three assumptions.\n\nA.       In many species of animals, the stimuli emitted by newborns bring about parental care. In fact, the newborns of many species require parental care. Because a newborn has little else to offer than its own appearance and behaviour, it is logical that it is exactly these factors that elicit the parental care. Parents who do not react in the appropriate way to the appearance and behaviour of newborns reduce the fitness of their offspring and, therefore, the likelihood of the occurrence of behaviour rese
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Crying or weeping is increased production of tear due to strong emotional stress or pain. This practice is not restricted to negative emotions; many people have been known to cry when extremely happy. \n\nIn humans, emotional tears can be accompanied by reddening of the face and sobbing — cough-like, convulsive breathing, sometimes involving spasms of the whole upper body. Tears brought about by emotions have a different chemical make up than those for lubrication. As one of your other readers have pointed out crying releases a lot of stress and carries with it harmful chemicals away from your body.\n\nHave you not heard the phrase, "cry your heart out"... it makes good sense to cry out your feelings as it is bad to hold in emotions.... they say holding back really builds up toxins that can even lead to cancer.
757509
sometimes if your eyes are really dry, it stings when your eyes water,  you should put eye drops in them to water them up
288385
The psychic tears (or emotional tears) require an emotional response, or trigger to be activated. This response can be caused by an outside source, either pain or loss of love, etc., or from an inside source (self-realization of one's life and others). When emotions affect us, the nervous system stimulates the cranial nerve, in the brain and this sends signals to the neurotransmitters to the tear glands. Thus, we cry .The largest tear gland, the lacrimal gland produces the tears of emotion and reflex. Many believe that the body, in times of emotional stress, depends on this gland to release excess amounts of chemicals and hormones, returning it to a stable state.
14485
At the corner of our eye is a tube leading to the nose, at the top of which is a small container called a lachrymal sac. This sac is full of tears. When we yawn the muscles in our face squeeze this sac and tears spill out from the eyes.  This also explains why your nose runs when you cry.
1119312
Tears drain away from each eye along two channels marked by a tiny opening at the inner edge of each lid. The channels lead to the lacrimal sac at the side of the nose, which is why your nose runs when you cry. Yawning exerts pressure on the lacrimal sac causing normal tearing.\n\nIf you have excessive teary eyes (or they are tearing all the time), talk to your doctor about it. If it is just when you yawn or wind is in your eyes or you are crying, this is nothing to worry about.
5661
If your eyes water excessively, and you are having to wipe tears from your cheeks all the time, if may be that your tear ducts are blocked.\n\nSee an eye doctor who can flush out your tear ducts and check for blockages
1036512
Most mammals will produce tears in response to extreme pain or other stimuli, but crying as an emotional reaction is considered by many to be a uniquely human phenomenon, possibly due to humans' advanced self-awareness. Some studies suggest that elephants and gorillas may cry as well.
1100041
Our eyes look red when we are about to cry as well!