Tinnitus is divided into tinnitus patients and tinnitus population. In the normal population, tinnitus patients are short-lived, but most of them do not affect their lives and never see a doctor, so they are called tinnitus patients, while some patients have tinnitus that seriously affects their lives and work. Most of the tinnitus patients who come to the clinic to seek medical attention are conscious of the sound in the ear or in the skull, which is called “subjective tinnitus”. The common causes of tinnitus are mainly due to the joint production of auditory system lesions and/or other system lesions, and can be divided into the following categories: 1. External ear lesions: If the external ear canal is blocked by foreign bodies, ear wax, tumors, fungal disease or inflammatory swelling, tinnitus can be produced, and its severity depends on the degree of blockage. 2. Middle ear lesions: Eustachian tube lesions, acute and chronic otitis media, tumors, etc., can also be seen in otosclerosis and vascular lesions within the tympanic chamber. The tinnitus caused by otosclerosis is intermittent and low-pitched at first, and then gradually worsens and can become persistent. 3. Inner ear lesions: Meniere’s disease, sudden deafness, otosclerosis, inner ear damage caused by drugs, noise and infections, are mostly high pitched, intermittent or persistent. 4. Lesions of the central auditory system: such as auditory neuroma often have strong high-pitched tinnitus. 5.Noise tinnitus is often high pitched: those with a long duration of disease tend to have persistent tinnitus. 6. Tinnitus caused by other systemic pathologies: hypothyroidism, diabetes mellitus, and inner ear concussion caused by head trauma, etc. In contrast to “subjective tinnitus”, there is another type of tinnitus that can be heard not only by the patient but also by others, and the latter is called “objective tinnitus”. The latter is called “objective tinnitus.” It is a low-pitched, intermittent clicking or buzzing sound that is caused by muscle clonus in or near the ear. Vascular anomalies including carotid body aneurysms, giant hemangiomas of the external auditory canal, jugular vein bullae protruding into the tympanic cavity, arteriovenous fistulas, and vascular ectopia can cause objective tinnitus, which is characterized by a low-pitched, wind-like pulsation that is consistent with a pulse and is often unilateral. In the case of abnormal opening of the eustachian tube, a blowing wind-like tinnitus is heard, with a frequency consistent with breathing. In short, tinnitus should not be underestimated. We suggest that once tinnitus occurs, you should be alert and seek medical attention in a timely manner, so that you can get rid of tinnitus as soon as possible by adopting scientific and correct diagnosis and treatment methods.