Mouth sores are clinically called mouth ulcers and quick pain relief is usually treated with medication, physical and psychological therapy. It is also necessary to remove external stimuli. 1. Drug treatment. Want to quickly solve the pain, is generally the use of anti-inflammatory pain relieving drugs, such as cediriodine tablets, tretinoin ointment, lidocaine gel, glucocorticoids such as dexamethasone and other drugs. 2. Physical therapy. You can use laser, ultrasonic atomization, microwave, ultraviolet light or cryotherapy to solve the pain and promote ulcer healing. 3. Psychotherapy. Ulcer attack and psychological related, need to maintain a happy mood, if necessary, do psychotherapy. Ulcer pain is intense also need to check whether there are bad restorations or sharp teeth stimulation in the mouth, need to remove the bad stimulus. Medications should be used under the direction of a physician.