Greasy hair and hair loss are considered a high probability of seborrheic dermatitis. Seborrheic dermatitis is associated with mental, vitamin B deficiency, diet, and alcoholism, as well as with colonization of Malassezia, increased lipids, and impaired skin barrier function and immune response. Therefore, in the treatment of seborrheic dermatitis, vitamin B6 can be taken, and it is also important to pay attention to a regular lifestyle, ensure sleep, regulate diet, restrict a fatty and sugar-rich diet, limit alcohol consumption and spicy and stimulating foods, avoid excessive cleansing, and enhance oil control as well as moisturizing. In addition to oral vitamin B6, shampoo containing ketoconazole should be used to wash the hair. If itching is severe, antihistamines such as loratadine tablets and levocetirizine tablets can be given to relieve itching and sedation.