Tinnitus is not a precursor to sudden death. Tinnitus may be caused by outer ear lesions, middle ear lesions, inner ear lesions, vascular tinnitus and other factors. 1. External ear lesions: Cerumen impaction, tumor, foreign body, bleeding and other lesions in the external ear canal may lead to blockage of the external ear canal and tinnitus symptoms. 2. Middle ear lesions: middle ear can also cause tinnitus due to trauma, infection and other factors, common diseases include tympanic membrane perforation, acute otitis media, secretory otitis media and so on. 3. Inner ear lesions: lesions in the inner ear may lead to tinnitus, common inner ear diseases include inner ear blood supply insufficiency, Meniere’s disease, inner ear infections, trauma and so on. 4. Vascular tinnitus: the disease may be caused by hypertension, arteriovenous fistula and other factors, tinnitus symptoms are generally consistent with the rhythm of the pulse. There are many symptoms that cause tinnitus, it is recommended that patients go to the hospital in time to clarify the cause of the disease, strictly under the guidance of the physician to carry out the relevant treatment.