Alopecia areata is the loss of hair due to detachment of hair roots from hair follicles. The causes of hair loss are quite diverse and can be induced by head skin diseases or Yin deficiency and blood deficiency as well as kidney deficiency. To cure hair loss, the first thing to do is to find the cause. First of all, hair loss due to seborrheic dermatitis is also called androgen-dependent alopecia, which is caused by the high amount of androgens in the body, resulting in an increase in the amount of hair loss on the head, and it is necessary to use medication to treat this skin disease to curb the phenomenon of hair loss. You can take a variety of drugs that inhibit androgen levels internally, use coal tar or selenium disulfide lotion to clean the affected area of the head, and then apply some topical creams that inhibit dermatitis, after the dermatitis is cured, the hair loss problem can generally be effectively relieved. At the same time, more vitamin B supplements can better prevent the development of seborrheic dermatitis. If hair loss is caused by physical weakness or nutritional deficiencies, it is fundamentally important to take more nutritional supplements and actively regulate the body. Eat more high-quality and rich protein food daily, and also eat more things that are good for hair growth, such as black sesame, spinach and black beans and sea fish, and eat less oily and acidic food. When hair loss is more serious, you can use some hair growth or anti-hair loss shampoo or medicine, but generally speaking the effect is not obvious, it is mainly to solve the root cause and strengthen the conditioning. Paying attention to nutrition, exercising more and having good sleep quality, together with a happy and positive mood, is a more effective way to prevent hair loss. To cure the hair loss problem, the cause should be identified, seborrheic dermatitis hair loss caused by the first androgen suppression treatment, while other problems such as nutrition and sleep or endocrine problems, you need to start from the conditioning, you can also try to use anti-hair loss shampoo.