Damage to the eardrum can cause hearing loss, but is generally not deafening. Because the eardrum is only a part of the sound conduction, not the induction part, trauma caused by the eardrum perforation as long as the infection does not persist, the rupture hole area is not large, usually in about 1 month can be healed on their own, do not need additional treatment, the hearing will be naturally restored. However, if the eardrum perforation is caused by a blast, it may lead to greater hearing loss, or even sensorineural deafness, which will have a tendency to deafness, and timely treatment, with the possibility of recovery. Perforation of the eardrum in chronic otitis media, in addition to causing hearing loss, will also develop an ear fistula, i.e., pus from the ear. In later stages, the epithelium migrates and grows into the tympanic cavity, and there is a risk of cholesteatoma formation, so surgery is necessary to repair it. Surgery is usually minimally invasive and can be performed using the temporal muscle fascia around the ear or the cartilage of the ear screen, with a success rate of over 90%. A tympanoplasty or tympanoplasty can eliminate the ear fistula and improve hearing at the same time.