Idiopathic tinnitus, also clinically known as sudden tinnitus, refers to tinnitus of unknown cause and sudden onset. The tinnitus may appear suddenly within a few hours or within a few days for no more than about three days. Clinically, this disease may be related to insufficient blood supply to the inner ear and poor microcirculation in the inner ear. The specific causative factors may be related to fluid accumulation in the vagus of the inner ear membrane, microthrombosis of the inner ear vessels, vasospasm of the inner ear, and damage to the hair cells of the inner ear. It is recommended to go to the ENT clinic as soon as possible, and the doctor will improve the tympanic membrane and pure tone hearing threshold, sound conduction resistance and other related tests to confirm the diagnosis.