If psoriasis occurs when the rash is redder and the itching is obvious, the diet should try to avoid fish, shrimp, crab, wine, chili peppers or hairy substances such as beef and mutton. There are also fruits such as mango, durian and other fruits to eat as little as possible, but eating peanuts, eggs and such foods do not have much to do with it. If a psoriasis patient only has the manifestation of a rash without self-sensory symptoms, such as itching, there is no food that needs to be specifically avoided in terms of diet at this time. However, smoking and drinking should be minimized, and attention should be paid to the regularity of work and rest.