I have tinnitus. after a non-related surgery when the general anesthesia wore off the ringing was gone temporarily. any idea why? maybe a drug used?

Vascular disease: Tinnitus is often due to a decrease of the blood going to the auditory nerve. The anesthesia relaxed the blood vessel and left more blood going to the nerve temporarily. Neural therapy to the ear area or taking large doses of l-arginine or some oral chelation under physician guidance with edta preparations may be helpful.

Tinnitus is: A perceived sensation of sound happening without a source of external acoustic stimulation...Excessive noise, trauma, middle ear problems, specific drug side effects, local tumor, progressive hearing loss can be responsible. An evaluation by an ENT and/or an audiologist is advised, even though your symptoms may have abated.

See below: Many of the medications we use in general anesthesia have an effect on the brain, we are not completely sure how this works. These drugs also can take time to get out of your system, up to three days. It is possible that the tinnitus was temporarily removed due to residual anesthesia. Then returned when the drugs were removed from your system.