A schwannoma is a benign tumor that grows from the nerve sheath, the insulating wrap around nerves. It usually shows up on one side and expands slowly, giving the body time to send early hints before any major damage occurs. The first hint is a one-sided hearing change. Sounds feel distant, you raise phone volume, and voices seem to echo in a tunnel. Next comes a “full” ear. The same ear stays plugged even after you pop it, yawn, or use drops. Electric face zaps appear soon after. Quick jolts shoot across the cheek or jaw, last seconds, and feel... Learn more