The cause of chronic urticaria is complex, and it is difficult to find a clear cause for the disease. Diet is a big concern for patients, and every patient asks, “Doctor, what can’t I eat?” when they see a doctor. I hope that I can help more patients by writing down these things that need attention and posting them online. The occurrence of urticaria is closely related to the daily diet, and dietary control that is necessary. First of all, avoid eating seafood, such as fish, shrimp, crab, shellfish, etc. They are rich in heterogeneous proteins, a large amount of consumption in a short period of time may lead to aggravation of the disease. Secondly, we should avoid alcohol and spicy stimulating food, such as: onion, ginger, garlic, pepper and so on. Again, we should eat less food containing preservatives and color additives, such as cookies, bread, soft drinks, pastries, etc. Chinese medicine believes that “hairy things” also in the scope of the mouth, such as pork, eggs, cattle, lamb, dog meat, goose meat, leeks, bamboo shoots, spinach, mushrooms, etc.. Of course, the above-mentioned taboos are not absolute. If you have conditions, you can go to the hospital to do an allergen test, but it is impossible to include all kinds of food. The more reliable methods are the food record method and the food exclusion method. The food record method is to make a detailed record of the relationship between the type of food eaten, the time of day and the occurrence of allergy symptoms, and analyze the diet in the 12-24 hours before the onset of the disease to find the foods that may cause allergy. The food exclusion method is to eat light, infrequently allergenic foods first, then add a food every 4-5 days, observe the reaction, and if allergic symptoms occur, you can confirm that it is caused by it, and then strictly avoid eating it. If friends do not want to disappoint the tongue, try these two methods, do not completely blindly avoid the mouth, some patients even told me that only eat radish and green vegetables every day, which will lead to malnutrition, but reduce their immunity, which is counterproductive to the treatment.