Tinnitus is often thought of as a ringing in the ears, but it describes any abnormal noise that seems to be coming from inside the ears or head. In addition to ringing noises, it may involve humming, whistling, buzzing, hissing or roaring sounds.
Tinnitus is a symptom of another medical issue, rather than being a condition on its own. For example, it can result from a build-up of earwax, a middle ear infection (acute otitis media) or hearing loss. Alternatively, temporary tinnitus can also occur from exposure to a sudden loud noise or a blow to the head. Mild or temporary tinnitus is common, whereas only a few people experience severe symptoms.