Sudden deafness with sound inside is a kind of sudden deafness and tinnitus, the etiology of which is unknown, and may be related to blood supply disorder of the inner ear as well as membrane labyrinth accumulation. 1. Disorders of blood supply to the inner ear: for example, spasm and embolism of the local arteries, affecting the local blood circulation, which may cause an imbalance in the hearing function, resulting in hearing loss, leading to sudden deafness and tinnitus. 2. Membrane labyrinth fluid: for example, mental stress, irregular diet, exertion, emotional excitement, autonomic nervous system dysfunction can cause microcirculation disorders in the inner ear, thus causing the membrane labyrinth fluid, affecting the physiological function of the inner ear, sudden deafness, tinnitus and other phenomena can also occur. Sudden deafness may have other causes, it is recommended to go to the hospital in time for further examination to clarify the cause of the disease.