Tinnitus refers to ringing or noise in 1 or both ears that is not caused by an external sound and only the affected person can hear it. It is often a symptom of an underlying condition, such as presbycusis (hearing loss caused by old age) or an ear injury.
Tinnitus is a common problem affecting around 20% of adults and can vary from a low roaring sound to a high squealing pitch. Although it can be annoying, it is not a serious problem and can be treated.