Tinnitus is the perception of sound when no external sound is present. People often describe it as ringing, buzzing, hissing, or whistling within the ears or the head. The sound may be constant or intermittent and can vary in loudness as well as pitch.

Tinnitus is not a disease itself. It is a symptom of changes within the hearing system, which may involve the ear, the auditory nerve, or how the brain processes sound. It can, however, be caused by any insult, pathology or trauma that reduces hearing acuity.

Tinnitus can sound different from person to person but is typically high in pitch. Common descriptions include: Ringing Hissing Whistling Clicking Roaring The sound may occur in one ear, both ears, or seem to come from inside the head.

Tinnitus is very common. It is estimated that around 1 in 8 people experience tinnitus at some point, and a smaller proportion find it persistent or bothersome.

Yes, the onset can be abrupt. Some people experience tinnitus suddenly, particularly after exposure to loud noise, an ear infection or a sudden change in hearing. If tinnitus appears suddenly or occurs in one ear only, it is advisable to seek professional advice.