It is possible to take vitamin C for mouth ulcers. Vitamin C and vitamin B can be used to maintain the integrity of the mucosal epithelium and can promote rapid healing of mucosal ulcers during ulcers. Mouth ulcers are more common in life and have the highest incidence among oral mucosal diseases, while mouth ulcers have both periodic and self-limiting characteristics. The self-limiting characteristic is that mouth ulcers usually heal naturally in about 1-2 weeks, and eating vitamin C tablets or eating some fruits rich in vitamin C can help mucosal ulcers heal quickly, you can eat apples, watermelon, oranges, oranges, plums, peaches and other fruits, and likewise eating fruits containing vitamin C after the ulcers heal can effectively prolong the interval between ulcers and reduce the number of ulcer attacks.