The most common causes of ear pain when chewing are acute otitis externa, cerumen embolism in the external ear canal, foreign bodies in the external ear canal, acute pharyngitis, and acute tonsillitis.
Acute otitis externa is an acute inflammation of the external ear canal, which usually occurs after ear extraction, water in the ear or trauma, etc. Its main symptom is ear pain, which is aggravated when swallowing or chewing. When the cerumen or foreign body in the external ear canal is hard, the pain is caused by friction between the wall of the ear canal and the wall of the ear canal when chewing, and it is necessary to go to the hospital to have the cerumen or foreign body removed by a professional otolaryngologist. The most common symptom of acute pharyngitis and acute tonsillitis, which is pain in the throat, causes ear pain because of the pain caused by the radiation from the trigeminal and glossopharyngeal nerves to the ear. Most of this nerve involvement pain manifests itself as persistent and is aggravated by swallowing or chewing. This condition requires active treatment of inflammatory diseases of the pharynx and appropriate painkillers for severe pain.
To sum up, if you have ear pain when chewing, you should first go to the local regular hospital ENT department to clarify the cause of the ear pain and carry out targeted anti-infection and other symptomatic treatment, which is usually curable.