Dandruff on the head is usually caused by bad habits, excessive cleaning, seborrheic dermatitis. 1. Bad habits: If you eat more greasy, spicy, stimulating food, resulting in the body to produce more oil, will lead to dandruff; also need to pay attention to ensure that sufficient sleep time, avoid staying up late, fatigue and mental tension, etc., for the relief of the phenomenon to improve the dandruff has a more positive significance. 2. Excessive cleansing: If you wash your hair more frequently, resulting in excessive scalp cleansing, you will also damage the scalp, causing dandruff on the head. 3. Seborrheic dermatitis: If the sebaceous glands in the patient’s head secrete abundantly, resulting in the inability to excrete in time, so that the fungus, bacterial reproduction and growth caused by the inflammatory reaction caused by seborrheic dermatitis of the scalp, there will be chaffing dandruff, resulting in the appearance of a large number of patients with grayish-white dandruff. If the patient’s head dandruff is more, can not be improved through life management, it is recommended to go to the hospital for examination and diagnosis in a timely manner, clear the cause of the disease and actively take interventional measures, to avoid delaying the condition caused by the aggravation of the symptoms.