Open mouth and cheek bone pain may be due to TMJ disorder, the degree of mildness may be relieved after a period of time, and the symptoms may disappear within 1~2 days, but severe cases need to be treated in hospital as soon as possible, and may not be able to be cured on their own. Pain in the cheek bone when opening the mouth may be caused by TMJ disorder. Depending on the severity, if the pain is mild, it may be relieved by applying localized hot compresses, eating soft food, opening the mouth with a small amplitude, and avoiding unilateral chewing for a period of time, and it may be cured by itself. However, if the degree is serious, it may not be able to heal itself. It is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.