Just after washing the head is very oily may be scalp barrier function impaired physiological factors, may also be androgenetic alopecia and other diseases. 1. physiological factors: if long-term use of ingredients more stimulating shampoo, or frequent washing may damage the barrier function of the scalp, resulting in abnormal secretion of sebaceous glands of the scalp, the phenomenon of just wash your head is very oily. 2. Androgenetic alopecia: the cause of the disease is mostly related to heredity, androgens and other factors, poor work and rest, diet and other habits may also trigger the disease. The disease occurs in the scalp, patients mainly manifested as hair loss, greasy hair and other symptoms. Some patients may experience oily hair just after washing. The reason why the hair is oily just after washing is not unique, after excluding physiological factors, it is recommended that the patient go to a regular hospital, clear cause of the disease after the symptomatic standardized treatment.