Wash your hair during menstruation, menstruation is no longer, on the one hand, may be the cold stimulation caused by washing hair, on the other hand, may be the existence of stress and other factors lead to endocrine due to abnormalities or the existence of organic lesions, or their own cycle of menstruation to the end of the period. 1. The capillaries in the human head are very rich, washing hair during menstruation, if you don’t pay attention to warmth, blow dry your hair in time or wash the water cooler, so that the head is subjected to cold stimulation, resulting in slowing down of the blood circulation, triggering a decrease in the amount of menstruation or menstruation stops phenomenon. 2. High work or study pressure, late night, lack of sleep, etc. may also induce menstrual flow to decrease or stop. 3. Chronic endometritis or organic lesions such as adhesions in the uterine cavity or cervical canal may lead to decreased menstrual flow or cessation of menstruation. 4. It is also possible that the normal state of itself, the menstrual period of this cycle to end. Women during menstruation should pay attention to the small stomach warm, not cold, so as to promote the discharge of menstrual blood.