Mouth ulcers have a certain relationship with staying up late, staying up late can lead to a decrease in body resistance, and the occurrence of mouth ulcers is generally associated with a decrease in resistance, but mouth ulcers are self-limiting and generally do not need to be treated with medication. The cause of mouth ulcers is still unclear, a variety of reasons can cause the occurrence of recurrent mouth ulcers, such as paranoia, physiological period, etc., can lead to low body resistance, which will lead to the symptoms of mouth ulcers. In addition, staying up late and mental tension can also cause patients to develop mouth ulcers. This kind of mouth ulcer is characterized by easy recurrence and self-healing, i.e., it recurs in the mouth and may grow and heal in one part of the mouth and then appear again in the next part. After the occurrence of mouth ulcers, there will be local painful symptoms, so you should pay attention to your diet during the disease, and it can generally heal in about 2 weeks. For patients with more serious symptoms of mouth ulcers, you can use stomatitis spray, lincomycin lidocaine gel and other drugs locally under the guidance of a doctor, which can reduce the pain of the ulcer and promote healing. Patients should usually pay attention to relaxation, adjust emotions, avoid tension and anxiety, as well as moderate exercise to promote ulcer healing and avoid recurrence.