Tinnitus is the perception of abnormal ear or head noises. Tinnitus is unpleasant enough itself. It is also sometimes a symptom of other problems, including hearing loss, tumors, and narrowing of the blood vessels.

Noises may be high pitched and “ringing,” or sound more like a clicking. Some tinnitus is pulsatile. This means that it may be caused by the flow of blood that accompanies each heartbeat. This type of tinnitus is a result of the narrowing of the blood vessels.

The Ear
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Many diseases and conditions are associated with tinnitus, including:

Occasional episodes of tinnitus lasting at most a few minutes are quite common in normal people, especially after exposure to loud noises.