Tinnitus is a relatively common condition that affects millions of people around the world. It’s characterized by a ringing, buzzing, or humming sound that is heard in one or both ears. This sound is not caused by an external source, and is often described as a high-pitched or low-pitched noise that can be continuous or intermittent. In this article, we’ll cover what causes tinnitus, the symptoms, diagnoses, and treatments to help patients cope with the ringing.