There are more treatment methods for mouth sores, mainly local application or systemic oral medication, as follows: 1. Local application: local application of watermelon cream, cetiolium tablets, and tin dispersion can achieve the effect of anti-inflammation, pain relief, prevention of infection, and promotion of healing. 2. Systemic oral medication: if the mouth ulcer is recurrent or the ulcer area is relatively large, oral prednisone acetate tablets of adrenocorticotropic hormone drugs can be taken. Anti-inflammatory, reduce inflammatory exudation. The ulcer mainly depends on the usual attention, keep your mouth clean, quit smoking and drinking, live a regular life, ensure sufficient sleep, adhere to physical exercise, eat a light diet, eat more fruits and vegetables, and eat less spicy, stimulating food.