There are many reasons for male hair loss, the main reasons are the following: first, seborrheic dermatitis resulting in seborrheic alopecia, male androgen secretion is high leading to abnormal levels of hormone secretion in the body, excessive oil secretion to form seborrheic alopecia. Second, due to high mental stress, life stress, mental tension appear psychogenic alopecia. Third, hair loss caused by trauma can lead to local hair follicles being broken fast causing hair loss or trauma leading to plant nerve disorders that inhibit the growth of hair in the follicles. Fourth, kidney deficiency type hair loss, men to a certain age easily cause kidney deficiency alopecia, kidney deficiency alopecia with back pain, weakness, etc.. Fifth, fungal alopecia, the usual personal hygiene is not careful, causing fungal infections appear hair loss.