Hearing loss is the main manifestation of tinnitus, and its causes are as follows: 1. Louder tinnitus causes a decrease in auditory sensitivity, and although the sound can be heard, it is difficult to discern the specific content of the sound, and the discriminatory function is diminished leading to hearing loss; 2. Long-term tinnitus can cause damage to the sensorineural nerve of the sensorineural canal and the ear nerve group, leading to hearing loss. Clinically, it is common to see neurogenic tinnitus, which has difficulty in recovering physical strength and remains untreated for a long time. 3. It is due to recurrent episodes of chronic secretory otitis media, which leads to mastoiditis or cholesteatoma, which can also cause tinnitus and hearing loss at this time, and mastoid CT can clearly diagnose it. The mastoiditis needs to be treated surgically, which requires hospitalization and can be cured in about a week.