Ear examination includes outer ear examination, audiological examination, CT of temporal bone or nuclear magnetic examination of internal auditory canal. 1. External ear examination: including whether there is any redness, swelling, lump or boil in the auricle, electro-otoscopy or otoscopy to check whether there is any eczema, pus or cerumen in the external ear canal, whether the tympanic membrane is intact, whether there is any perforation or congestion, and so on. 2. Audiological examination: abnormal hearing requires tuning fork test, pure tone threshold audiometry and acoustic impedance examination, which can determine the specific situation of the current hearing. Acoustic impedance can understand whether there is negative pressure in the tympanic chamber, fluid and stapedius muscle reflex. If necessary, otoacoustic emission and auditory evoked potentials can be performed to objectively assess the inner ear. 3. Temporal bone CT or inner auditory canal MRI: If pus is found in the ear, it is also necessary to perform temporal bone CT to clarify the specific conditions of the mastoid and the tympanic chamber and inner ear. If a tumor growth is found in the inner ear, an internal auditory canal nuclear magnetic examination is needed. If ear discomfort is found, it is recommended to go to the hospital for further consultation and arrange different examination programs according to different conditions to avoid delay.