Patients with mouth ulcers can supplement with vitamin C, vitamin B2, vitamin B6, vitamin B12, vitamin E. Patients need to eat more fresh vegetables and fruits, which are recommended to be fruits rich in vitamin C and soft in texture, such as orange, grapefruit, dragon fruit, cherry, kiwi, etc.; you can also squeeze fruits such as apple or white pear into juice and drink it; you can also use oral vitamin tablets to supplement For example, multivitamin tablets, vitamin C tablets, etc. to supplement vitamins. Patients with mouth ulcers should avoid spicy and irritating foods in their daily diet, and focus on light, warm and soft foods, while maintaining a regular work and rest schedule, avoiding late nights and black and white reversals, and paying attention to oral hygiene, carefully brushing and rinsing, and actively treating cavities and periodontitis if they are present in the mouth.