Ulcers in the mouth should be treated, and the main treatments include general treatment, medication, other treatments and so on. 1. General treatment: eat more fresh fruits and vegetables, ensure enough rest, avoid overwork, appropriate physical exercise. 2. Drug treatment: including local medication and systemic medication. Local medications include painkillers such as lidocaine, anti-inflammatory drugs such as chlorhexidine gargle, and drugs to promote healing such as watermelon cream and healing new liquid. Systemic medications include immunosuppressants such as thalidomide and vitamins such as vitamin C. 3. Other treatments: Physical therapy, such as physiotherapy, can help regenerate the oral mucosa. Psychotherapy can help relieve anxiety and tension. If you have ulcers in your mouth, you should go to a regular hospital and follow the doctor’s requirements for treatment and medication.