0 Human emotional tears are very rich in a type of salt called manganese and a type of protein called prolactin. When these two substances come out of the body, people feel a lot of comfort. I mean someone was very upset , he cried for a while , and with that these became water and came out of the body. Then he will feel much lighter. His upset will be much less. Also, when someone cries , the people around him all realize that he is not feeling well for some reason. Either he's upset , or he's very depressed , or he's extremely hesitant. And the fact that he was able to express his feelings to the people around him , it will lighten his mind a lot. So when people are in pain, they naturally release manganese and prolactin. It is comforting and we cry when the water comes out of manganese and prolactin. Usually men can withstand more stress than women so they cry less. This is how children cry more.