Tinnitus can be caused by a variety of factors, including age-related hearing loss, ear injury from loud noises, some medications and certain health conditions such as high blood pressure or diabetes. In addition, head and neck injuries can cause tinnitus due to the disruption of nerve pathways in the inner ear or auditory brainstem. Less common causes include a buildup of earwax, an acoustic neuroma (a benign tumor on the cranial nerve that runs...