Seborrheic dermatitis usually occurs in places with more sebaceous glands, such as scalp, face, chest and wrinkles. Therefore, patients should be forbidden to drink alcohol, eat less spicy, fish and shrimp seafood, beef and mutton, dog donkey meat and other irritating and greasy foods, eat more vegetables and fruits, and drink more water. Seborrheic dermatitis can often cause seborrheic alopecia in patients, and too much oil will block pores, so it will cause seborrheic alopecia. Patients should pay attention to active treatment.