If the hair is small, first need to clarify the specific reasons, and then consider the corresponding treatment program. Hair less, may be due to malnutrition, usually in the diet should pay attention to balanced nutrition: 1, need to pay attention to eat more protein-rich foods, such as lean meat, beans, dairy, poultry. 2, to eat more vitamin-rich foods, such as tomatoes, kiwi, mango and other fresh vegetables and fruits. 3, but also need to pay attention to eat more iron, copper, zinc and other trace elements of food, such as spinach, walnuts, black sesame, sea shells, etc.. Trace elements of food, such as spinach, walnuts, black sesame, sea shells and so on. The appearance of less hair, may be caused by seborrheic alopecia, this situation is the body androgen level is elevated caused by, can consider oral finasteride for treatment.