Darkening
When we suddenly stand up from the squatting position, we will feel dark and Venus will be in trouble, and some people will feel that they have anemia. In fact, this is a normal physiological response, which is caused by a sudden change in the position of the human body causing hypotension. In addition, when people are suddenly hit by feelings, extreme hunger, etc., their eyes may become dark. None of the above problems are very serious. The frightening thing is that the darkening in front of the eyes is accompanied by other corresponding symptoms.
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