The phenomenon of hearing a sharp sound in the ear may be tinnitus, or it may be caused by factors such as trauma or purulent otitis media. 1. Neurogenic tinnitus: Neurogenic tinnitus is a common and frequent disease in otology, caused by lesions or abnormalities in the cochlea, auditory nerve and central auditory pathway. 2. Trauma: The tympanic membrane ruptures due to a violent external impact on the head and neck, which may lead to the phenomenon of hearing a sharp sound in the ear, accompanied by ear pain and a small amount of bleeding from the external auditory canal. 3. Suppurative otitis media: Suppurative otitis media can lead to marginal perforation of the tympanic membrane, large perforation of the tension part or complete absence, which in turn causes mild conductive deafness, and therefore the phenomenon of hearing a sharp sound in the ear may occur. There may also be other reasons for the ear to hear a sharp sound, it is recommended to consult the hospital in time to identify the cause of the disease and actively cooperate with the doctor’s treatment.