The formation of dark circles is related to the following factors: genetic constitution and physiological structure. When the skin around the eyes is very thin and the subcutaneous tissue is very few, when the blood flows through the great vein here, a blue-black halo will appear below the surface of the skin, which is called dark circles. Insufficient sleep and excessive fatigue make the eyelids unable to rest and are in a state of nervous contraction. The blood flow in this part increased for a long time, which caused the blood vessels in the subcutaneous tissue of the eye socket to fill, which led to the congestion of the eye socket and left a shadow. Loss of kidney qi makes the eyes lack the nourishment of essence, which makes the black float on the ground, so the eyes are black; People who are weak after a long illness or who have recovered from a serious illness are prone to pigmentation due to the weak subcutaneous tissue around the eyes, and are easily exposed to the upper and lower eyelids, resulting in a layer of dark circles; Women with irregular menstruation, such as functional uterine bleeding, primary dysmenorrhea, early menstruation, irregular menstruation, long menstrual period, heavy menstrual flow, late pregnancy, old age, etc. , there will be dark circles, others are genetic, excessive use of cosmetics, so that pigment particles penetrate, excessive sexual intercourse, etc ...........................................................................................................................................