Oral ulcer is a very common oral disease. Its main characteristic is that it recurs frequently, and there are also many causes of oral ulcers.

For example, deficiencies in vitamins and trace elements, disorders in digestive system function, and the occurrence of digestive tract diseases.

If a person has a relatively low immune system, they are also prone to getting oral ulcers.

Mental stress, mood swings, and poor sleep conditions can all lead to the occurrence of oral ulcers.