Hair loss of 70-100 roots per person per day is a normal physiological phenomenon. While washing hair loss 200 hair belongs to pathological hair loss, you need to actively look for the cause and treat it symptomatically according to the cause. Hair loss can be divided into permanent hair loss, temporary hair loss, as follows: 1, permanent hair loss is due to various lesions caused by the destruction of hair follicles, resulting in hair can not be regenerated, such as pseudo-baldness, scarring alopecia, alopecia areata folliculitis, etc.; 2, temporary hair loss is common in certain infectious diseases, such as ringworm, syphilis, drugs, psychogenic hair loss, and physical factors such as burns or nutritional metabolic disorders, consumption Excessive, hyperparathyroidism, estrogen deficiency, etc. can cause hair loss and should be treated according to different causes.