Seborrheic dermatitis is caused by bacterial infection in hair follicles, so we can use some antibacterial drugs such as ketoconazole and topical hair follicle health care liquid to remove fat, diminish inflammation, sterilize and relieve itching. Usually, you can eat more foods rich in vitamins, especially foods rich in vitamin A, such as radish and pork liver, and you can also eat more fresh fruits and vegetables. In addition, we should pay attention to the law of life, get enough sleep, avoid drinking and spicy food, and eat less. Avoid scratching your hair and other mechanical stimuli. When washing your face and hair, it is best not to use soap, let alone hot water to relieve itching. It is necessary to strengthen the maintenance and nursing of scalp hair follicle environment to avoid serious damage to hair follicles. Through maintenance and nursing, hair follicles will gradually recover, and scalp hair quality problems will be improved. In this respect, the hair follicle health of the source skin has a good maintenance and nursing function.