What causes tinnitus in sudden hearing loss?
1. have one's inner ear broken
The inner ear contains hair cells, which sense sound and transmit sound to the brain. In sudden hearing loss, the hair cells are destroyed by poor blood flow or viral neuritis, so sound is not transmitted properly.
2. Damage one's brain
The brain has two parts: the theoretical brain (the part that calmly analyzes and listens to sounds) and the emotional brain (the part that feels whether sounds are pleasant or unpleasant).
Sound can only be heard when there is proper coordination between the ear and the brain, but when hearing is suddenly impaired due to sudden hearing loss, the emotional brain is startled and anxious and activates to search for the range of sound that cannot be heard. As a result of trying hard to hear sounds, tinnitus in the inaudible range appears.
Why tinnitus is so hard to treat with doctor's care
Tinnitus is a sound created in the brain, so the more anxious the brain feels and thinks "tinnitus is dangerous and scary," the louder the tinnitus feels.
It gradually goes away by reassuring the brain that tinnitus is not a dangerous sound and by restoring hearing, but steroids do not eliminate the brain's anxiety.
*Restoring hearing improves tinnitus, but because the hearing loss is often intractable, most otolaryngologists are told that tinnitus cannot be cured.
*Although it is not well known, the side effects of steroids can cause depression, and the more depressed a person becomes, the louder the tinnitus.