Pain inside the ear is considered to be related to foreign body in the ear canal, purulent otitis media, tympanic membrane perforation, and cholesteatoma of the external auditory canal. 1. Foreign body in the ear canal: when a foreign body enters the ear canal, pain inside the ear may occur due to irritation or damage to the local skin by the foreign body. 2. Purulent otitis media: this disease is related to pathogen infection, Eustachian tube dysfunction and other factors, the patient’s main manifestations are ear pain, discharge of secretions from the ear canal, hearing loss, tinnitus, ear stuffiness and swelling. 3. Tympanic membrane perforation: tympanic membrane perforation is related to trauma, ear infection, acoustic trauma, etc. Typical symptoms of patients include ear pain, hearing loss, tinnitus, small amount of bleeding, etc., which can be manifested as pain inside the ear. 4. Cholesteatoma of external auditory canal: the etiology is still unclear, it may be related to long-term inflammatory stimulation, tumor, trauma to the external auditory canal and so on. At the early stage of the disease, there may be no symptoms or mild symptoms. With the progress of the disease, some patients will have earache, hearing loss and other symptoms, which may be manifested as pain inside the ear. There are many causes of pain inside the ear, such as cerumen impaction, herpetic tympanitis, mumps, tonsillitis and so on. It is recommended that people with pain in the ear should consult a doctor for an examination to determine the cause of the pain and then follow the doctor’s instructions for treatment.