Baldness prevention needs to be analyzed according to the cause of the disease, androgenetic alopecia generally can not be prevented, due to physiological causes of hair loss, you can avoid perm, balanced diet, pay attention to rest and other ways to regulate. Androgenic causes hair loss and genetic related, can not be prevented, the need for timely treatment, commonly used drugs have oil control, anti-androgenic topical drugs, such as ketoconazole lotion, men can also be taken orally finasteride. Physiological causes such as improper hair care, drugs, stress, diet and other factors caused by the need to stop in time, take certain measures may play a preventive role. In daily life, avoid too tight hairstyles, reduce rubbing or pulling hair, avoid perming and dyeing, maintain physical and mental pleasure, avoid excessive mental labor, pay attention to balanced nutrition, eat more fresh vegetables and fruits, eat less spicy and stimulating food. When hair loss occurs, it is recommended that the patient should consult a doctor in time to find out the cause and follow the doctor’s instructions.