Patients who experience pain in the ear when opening their mouths often suffer from temporomandibular joint disorder in the front of the ear. Patients may have overactive joints due to recent excessive use of voice, excessive chewing due to recent consumption of hard food, or recent oral and dental treatment, which may cause temporomandibular joint disorders. Therefore, when patients open their mouths or chew, they may experience pain and discomfort in the temporomandibular joint, and may even experience a popping sensation in the joint. Patients need to pay attention to the protection of the temporomandibular joint in the near future, and avoid excessive chewing by talking as little as possible and eating soft food.