The bone on one side of the tooth always opens without pain may be caused by temporomandibular joint disorder. 1. When patients chew too hard food for a long time, it may lead to imbalance and incoordination of the joint functions on both sides, thus resulting in temporomandibular joint disorder. When patients suffer from temporomandibular joint disorder, they may have the symptom that the bone on one side of the tooth always opens without pain, and some of the patients may have the phenomenon of pain 2. pain, and it is usually accompanied by the sound of popping when opening and closing the mouth. 3. Patients should pay attention to try to avoid eating too hard food in daily life, avoid opening the mouth, but also to maintain a good mood. Patients appear teeth on one side of the bone is always open without pain, to go to the hospital in time for consultation, and actively cooperate with the doctor to carry out the appropriate treatment.