In general, adults shed 70-100 hair per day is a normal phenomenon, if there is no a lot of hair loss phenomenon, just keep a relaxed mood, pay attention to diet, work and rest health regularity can be. A, physiological hair loss 1, improper shampooing: hair loss when washing hair too much may be related to shampoo water too hot, shampoo stimulation or force pulling hair, can adjust the appropriate temperature of the water, use milder shampoo, shampoo as gentle as possible, avoid dyeing and perming. The best time to shampoo is before 10 pm to promote the regeneration of scalp cells, the water temperature is best at 37-40 ℃. When washing hair, pay attention to try not to scratch the scalp with nails, shampoo and conditioner rinse clean during the shampooing process, dry your hair after shampooing, wait for your hair to dry completely before going to sleep, you can protect your hair and scalp to avoid a lot of hair loss; 2, seasonal alternation: hair fall may also be related to seasonal alternation, hair growth cycle includes the growth phase, regression phase and resting phase, resting phase daily hair loss within 100 roots is normal The metabolism of this phase will last for 3-5 months. Resting hair loss without treatment, can eat more black food and nuts to improve hair loss; 3, postpartum hair loss: If women, may also be the delivery of hair loss, usually occurs between 2-7 months after delivery, hairline receding or overall hair becomes less, accompanied by itchy scalp, dandruff increased phenomenon, is a normal physiological phenomenon, no treatment, such as hair loss can be taken glutathione, B vitamins, etc.. Second, pathological hair loss 1, anemia: when excessive hair loss leads to head hair thinning, the patient accompanied by pale skin, dizziness, weakness, then consider the symptoms of hair loss caused by anemia, should eat more lean meat, eggs, etc., when taking iron supplements to avoid serving with tea, milk, so as not to affect the absorption; 2, seborrheic dermatitis: such as hair loss to gradually thinning, and can even see the patient’s scalp, and see the obvious dander, with Itching and other symptoms, then it may be seborrheic dermatitis, it is recommended that a healthy, balanced diet, oral vitamin B, the use of selenium disulfide in the head for cleaning or topical application of minoxidil application to relieve hair loss. In addition, in daily life, eating spicy and irritating food, overworking, staying up late for a long time, dyeing and perming hair can aggravate the secretion of sebaceous glands and affect the growth of hair follicles, leading to hair fall when washing hair.