When patients suffer from severe oral ulcers, they can purchase some mouthwash for daily use. Some mouthwashes are specifically designed for rinsing and can sterilize the mouth, eliminate odors, and reduce inflammation. Therefore, it is recommended that patients brush their teeth timely in the morning and evening and use mouthwash appropriately. They should also remove food residues promptly after meals.

Additionally, patients must pay attention to their daily lives and avoid consuming overly spicy, hard, or hot foods. It's important to protect the mucous membranes inside the mouth, as these tissues are delicate and cannot withstand prolonged strong irritations. Particular caution should be taken with corrosive foods because they can also cause irritation in the mouth.