Suddenly hear a sharp sound in the ear, medically known as tinnitus, can be caused by ototoxic drugs, otitis media, Meniere’s disease and so on. 1. Ototoxic drugs: such as the application of aminoglycoside antibiotics dihydrostreptomycin, kanamycin, neomycin and amikacin to the cochlea damage, streptomycin, tobramycin and gentamicin to the vestibular function of the main damage, as well as piroxicam, nivadex et al, can cause tinnitus phenomenon. 2. Otitis media: Typical manifestations are hearing abnormalities, including tinnitus, headache, and running water and pus in the ear canal. Inflammation will lead to congestion and edema in the tissues of the middle ear, which will affect sound conduction and cause deafness. 3. Meniere’s disease: manifested by episodes of vertigo and fluctuating hearing loss, nausea and vomiting. Tinnitus is also one of the main symptoms. Tinnitus may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.