The mountains are green and the water is beautiful to the eyes, but the hair is few and sad. Friends and patients often ask, “What should I do if my hair is falling out so much lately? Hair loss is divided into two kinds: physiological hair loss and pathological hair loss. Under normal circumstances, due to human metabolism, there will be a certain amount of hair loss every day, generally 30-50 hair loss per day, at most not more than 100, and related to age, season and other factors, hair loss in autumn and winter season is more obvious. Pathological hair loss probably has the following six conditions: 1, androgenic alopecia also known as early baldness. Related to genetics and androgens, characterized by progressive hair loss on the forehead and top of the head, mostly seen in men aged 20-30. The treatment of this type of hair loss can be used as external rubbing of minoxidil tincture, oral finasteride, and also scalp hair implantation. 2, seborrheic alopecia is caused by excessive seborrhea in the head, often accompanied by increased dandruff, greasy scalp, itchy and painful scalp discomfort. It is usually seen in young adults with strong sebaceous secretion, usually starting from the top of the head and spreading to the forehead. Seborrheic alopecia should eat less greasy and spicy food, diligently wash the hair, use local medicine to remove oil and grease, reduce dandruff, anti-inflammatory and relieve itching. 3, psychogenic alopecia is commonly known as “ghost shaving”, and sudden mental stimulation or high mental tension related. The manifestation is the sudden appearance of round or oval patchy hair loss on the head, no special discomfort in the affected area, smooth and shiny scalp, individual severe hair loss, or even eyebrows, beard, axillary hair, pubic hair, etc.. The main treatment measures for this disease is to find the cause, psychological guidance, relaxation, fresh ginger slices can be used to apply hair loss to the scalp red, apply 2 times a day. 4, chemical alopecia tumor patients receiving anti-cancer drug treatment, or long-term use of certain chemical drugs such as gentamicin, allopurinol, hypericin, thiouracil, trimethoprim, propranolol (insulin), phenytoin sodium, aspirin, anti-inflammatory pain, birth control pills, as well as the use of perms, hair cleansers, hair dyes, etc. can cause hair loss. Patients with this kind of hair loss pay attention to the dosage and course of medication, dye their hair as little as possible, and do not use irritating and poor quality hair dyes, perms and shampoos. 5, symptomatic hair loss many diseases can cause hair loss, such as anemia, postpartum deficiency, liver and kidney disease, malnutrition, systemic lupus erythematosus, dry syndrome, typhoid, pneumonia, meningitis, influenza, menopause, hyperthyroidism, tumors, etc.. Since this kind of hair loss is only a symptom of the primary disease, it is called symptomatic hair loss. For this kind of hair loss, the main thing is to actively treat the primary disease, and the hair will grow out again after the body recovers. 6, infectious alopecia fungal, parasitic, viral, bacterial and other infections can also cause hair loss. This kind of hair loss is accompanied by the primary disease, such as ringworm, flat warts and so on. This kind of hair loss should be for the infected pathogens to choose the appropriate treatment method. The above briefly introduces several common causes of hair loss and preventive measures. Various hair loss symptoms vary and can be affected by either one cause or multiple causes at the same time. If there is more serious hair loss, you must go to the hospital in time to do the relevant examination, find out the cause and targeted treatment, so as not to delay the condition.