Vitamin C can quickly treat mouth ulcers, but it is painful. When mouth ulcers, bleeding gums and tooth decay occur, vitamin C tablets are held in the mouth and the tongue is used to bring the vitamin C tablets to the onset position, bringing more serious pain. One contained tablet in an hour for mild symptoms will get better, and a few more tablets for serious symptoms will also get better. Vitamin C has other effects, such as improving the body’s emergency ability, improving the body’s immunity, cell protection, detoxification, liver protection, cancer prevention, antioxidants, prevention of atherosclerosis, prevention of gum recession and bleeding, as well as the treatment of leukemia, scurvy, and the promotion of collagen synthesis, promoting the conversion of ordinary protein into collagen, have many roles.