Tinnitus is a common clinical symptom in otolaryngology. Tinnitus is often irritating and affects their work and life, and it is also an early symptom of some diseases of the ear or the whole body. Systemic diseases When kidney disease, hepatobiliary disease, diabetes, tuberculosis, chronic bronchitis, etc. lead to systemic dysfunction, tinnitus symptoms often appear, and its characteristics are the same as those of tinnitus caused by drug intoxication, which are high-pitched and bilateral. This tinnitus usually disappears with the recovery of the above mentioned diseases. In addition, some data suggest that tinnitus may be a precursor of coronary heart disease. According to statistics, among patients with coronary heart disease who have tinnitus, 86.7% of them have tinnitus before angina, and 8.6% of them have angina and tinnitus at the same time. This is because the cochlea is more sensitive to ischemia and hypoxia. Experts point out that tinnitus can be an important sign of early heart disease. Therefore, a middle-aged or elderly person who originally had no tinnitus symptoms and suddenly developed tinnitus in the near future should have his blood lipids, blood pressure and electrocardiogram checked promptly to clarify whether he is suffering from hidden heart disease. Some people who have had tinnitus for a long time, but if it has recently worsened, they should also have their heart checked. Physical weakness This kind of tinnitus mostly has no organic lesion and is often caused by insufficient vascular tone and poor local blood supply. According to Chinese medicine, it is a manifestation of kidney deficiency. Nervous weakness This kind of tinnitus has variable pitch and is mostly bilateral, often accompanied by headache, dizziness, insomnia and dreaminess. This kind of tinnitus is also related to depression, and regulating emotions can make it better. Patients with ear disorders mostly have a history of ear disease, and tinnitus tends to worsen at night. Depending on the location of the lesion, it is divided into conductive tinnitus and sensorineural tinnitus. Conductive tinnitus can occur when there is cerumen, foreign body, inflammation and swelling in the outer ear, eardrum congestion, entrapment, perforation, middle ear effusion or infection, or otosclerosis. This kind of tinnitus often occurs on the side of the lesion and has a low tone, such as “rumbling”, “booming”, or “buzzing”. If there is an inner ear concussion, edema or auditory neuroma, it will stimulate the inner ear cochlea to produce tinnitus. This kind of tinnitus is mostly bilateral, with a high sound, such as cicada or hissing sound, and the tinnitus is often intermittent. When a neck tumor or other neck disease compresses the carotid artery, it can cause tinnitus on the compressed side. Tinnitus is characterized by persistent, low-pitched tinnitus, and the degree of tinnitus may vary with changes in body position. Drug intoxication damages the nerves in the inner ear High doses of quinine, quinidine, chloroquine, and other drugs can cause severe tinnitus, but it will improve after stopping the drug and mostly does not affect hearing. Drugs such as gentamicin, streptomycin, and kanamycin, which damage the auditory nerve and vestibular nerve, can cause tinnitus, which can rapidly develop into deafness and be difficult to recover from if the drug is not stopped in time. Tinnitus caused by drug allergy or poisoning is often high pitched and bilateral. In addition, menopausal syndrome can also cause tinnitus, especially in those who do not sleep well. However, there are a few patients with tinnitus of unknown etiology that require regular observation. In particular, patients with unilateral high-pitched tinnitus should go to the neurology and otolaryngology departments of hospitals for regular checkups in order to receive accurate and timely diagnosis and treatment.