The following are common causes of pain in the ear area when the patient is clenching his teeth: 1. temporomandibular joint disorder: It is possible that the condition of temporomandibular joint disorder in front of the ear may occur, and the occurrence of this temporomandibular joint disorder is often related to the patient’s recent eating of food with too hard a texture or excessive chewing. 2. Excessive use of the voice: Some patients may use their voice excessively to speak recently, or even suffer trauma to the joint area in front of the ear, which may also easily lead to similar symptoms. 3. Inflammation of the ear canal: Some patients may dig their ears with excessive force and other factors, leading to the occurrence of inflammation and swelling of the external ear canal, which may also trigger symptoms of ear pain when clenching the teeth.