If the mouth does not open widely and the bones of the cheeks hurt, it may be caused by trauma, temporomandibular arthritis, temporomandibular joint dislocation, and so on. 1. Trauma: When the patient’s cheek bone area is hit by the outside world, it may cause fracture or soft tissue damage, in this case, even if the patient’s mouth is not wide open, the symptom of pain in the cheek bone may also occur. 2. Temporomandibular arthritis: When the temporomandibular joint is stimulated by cold air or infected by bacteria, it will cause inflammatory disease, and the patient may also have the above condition. 3. Temporomandibular joint dislocation: when the patient uses the jaw to make large movements for a long period of time, the temporomandibular joint is likely to be dislocated, which will also lead to the above symptoms. Patients with this condition are advised to consult a doctor in time to investigate the cause of the disease and then cooperate with the doctor to carry out targeted treatment.