Why Do Your Eyes Get Red When You Cry for a Long Time?

Some children like to cry and can not stop once they start. As a result, the rims of the eyes become red and the eyelids get swollen. The reason is that the eyelid is very thin, and there are a lot of blood vessels on it. After a long time crying, the blood vessels will dilate and congest. So the eyelids look red. Generally, children close their eyes when they cry. The eye muscles would contract and the blood can not flow normally. At the same time, the children usually rub their eyes with their hands, so some fluid gathers under the eyelid. That is why the

eyelids are swollen.