Hello, oral ulcer, also known as "aphtha", is a very common oral mucosal disease. Huasu tablets, also known as Xidi buccal tablets, can be used. The main component is molecular iodine, which is quickly released under the action of saliva, directly halogenating protein, killing various microorganisms. It can be directly dissolved, and adults can take one tablet once, 3-5 times a day to relieve pain on the same day. 1 month.