Psoriasis is a recessive disease determined by multiple genes, and because it is recessive, less than 30% of patients have a family history. The main skin manifestation of psoriasis is red patches with thick silvery-white scales, hence the name psoriasis. In China psoriasis is also called psoriasis. Although there is a genetic background, psoriasis does not occur every time, and there are many patients with seasonal variations. Generally speaking, it is aggravated in autumn and winter and will be reduced in summer, but there are individual patients who have aggravation in summer. Most patients with psoriasis do not have itching, but there are some patients who have significant itching. Psoriasis itself is not an allergic disease and generally does not require strict avoidance of food, but some foods can cause dry heat in the human body, or fire, such as spicy food and alcohol. The so-called heat in the human body, in Western medicine, is likely to cause immune disorders, and any small change in the immune response can trigger the aggravation of psoriasis lesions. Therefore, psoriasis patients are not very suitable to eat spicy food and alcohol, like seafood beef and mutton, a small amount of food can be eaten, but also depends on the reaction of each person to these foods. If the rash worsens after eating, then it is necessary to avoid eating. Therefore, psoriasis does not require long-term abstinence from food, most of the food can be eaten. Whether or not a certain food needs to be avoided depends on the individual’s reaction. Too strict a taboo can cause poor nutrition and a decrease in immunity in the body, which is not good for health.