If you have ringing or hissing or buzzing in your ears, you have what medical experts refer to as “tinnitus." Experts have tried to pinpoint an exact physiological cause of tinnitus, but the mystery remains unsolved. Exposure to loud noise, head injuries, medication, and even earwax are thought to trigger the onset or worsen existing tinnitus. The sad fact is, science and medical professionals have yet to figure out what causes ringing in the ears ...