Ear pain from clenching can be caused by temporomandibular joint disorder (TMJD), which is usually self-correcting, but not in severe cases. It can also be caused by otitis media, which cannot be cured by itself. 1. Temporomandibular joint disorder syndrome: the cause of temporomandibular joint disorder syndrome is not yet clear, and it is considered to be caused by a variety of factors, such as trauma inside and outside the joints, depression, anxiety, etc. The cause of temporomandibular joint disorder syndrome is not yet clear. The main symptoms of temporomandibular joint disorder are pain in the jaw joints when opening and closing the mouth, difficulty in opening the mouth, etc., which can lead to symptoms of earache caused by clenching the teeth. Patients with TMJ disorder can be cured by themselves when their condition is not serious, but if their condition is more serious, they need to receive treatment. 2. Otitis media: Otitis media is mainly caused by bacterial, viral and other pathogen infections, and the patient will have symptoms such as earache, water or pus flowing from the ear canal, and hearing loss. If the patient himself suffers from otitis media, it can also lead to ear pain when the patient bites his teeth. Otitis media cannot be cured on its own, and patients should seek timely medical treatment. When the patient has the symptom of ear pain when clenching teeth, he should go to the hospital in time and follow the doctor’s instructions for treatment.