Common diseases in otology include: trauma, otitis externa, otitis media, hearing impairment, tinnitus, dizziness, sudden deafness, eustachian tube obstruction, hearing aid selection, artificial electronic otosurgery, listening and language training, etc. Conventional diseases of external ear can be seen in general hospitals, and diseases of middle ear and inner ear require higher instruments and technology. Take ear microscopy as an example. At present, it is Huaxi Hospital, Provincial People's Hospital and Renpin Otolaryngology Department.