Tinnitus is characterized by ringing or buzzing in the ears. Exposure to loud noises earwax blockages heart or blood vessel issues prescription medications and thyroid disorders can all cause tinnitus. See your doctor for an accurate diagnosis and work with them to develop a treatment plan. In many cases tinnitus is irreversible but there are several ways to reduce its severity. For instance sound generators hearing aids and medication can help mask ringing or buzzing. Tinnitus research is a constantly evolving field and you might be able to try experimental therapies as well.