Salt can be used for mouth ulcers, generally available low concentration of salt water to clean the mouth, but it is not recommended to use salt directly on top of the mouth ulcers. Mouth ulcers are common oral mucosal diseases, in the tongue, cheeks, lips, gums and other oral mucosa there are small and shallow defects or ulcers. Salt is an electrolyte, and if applied directly to mouth ulcers, it can cause localized irritation, localized damage to epithelial cells or nerve cells, and increased pain. If you want to use salt to clean your mouth, add water to make a low concentration of salt water and clean around the mouth. If there are mouth ulcers, you can follow the doctor’s instructions for external use of nourishing Yin Sheng muscle powder, ice boron powder, mouth ulcer powder pain, or oral vitamin C, vitamin B complex to improve the body’s self-healing ability. In addition, if uncomfortable symptoms, should promptly seek medical treatment, do not blindly use drugs, in order to prevent aggravation of the condition. Usually keep oral hygiene, avoid intake of spicy, stimulating food.