Canker sores are all part of the “sores” category, this patient is generally not recommended to eat fish, fish belong to the fishy hair class of food, easy to lead to local discomfort symptoms, increase the risk of infection, is not conducive to early recovery. Canker sores canker sores Chinese medicine believes that more by the poisonous evil invasion, evil heat burning blood, so that the stagnation of qi and blood, Western medicine believes that most of the Staphylococcus aureus infection caused by the hair follicles, sebaceous glands or sweat glands of acute suppurative diseases. Do not eat fish during treatment, fish belongs to the fishy hair class food, patients eat easy to aggravate the local infection lesions, increase the patient’s sense of pain, is not conducive to the early recovery of the disease. It is recommended that patients with canker sores should maintain a light and easily digestible diet, and can eat vegetables and fruits rich in vitamins and trace elements to help replenish nutrients and improve resistance, which will help shorten the course of the disease. At the same time, we should do a good job of local cleaning and disinfecting treatment to avoid aggravation of infection.