Tinnitus
Tinnitus is the perception of sound or noise in the ears or head that does not have an external source. This sound can be heard as ringing, buzzing, hissing, clicking, or roaring, and can be continuous or intermittent. Tinnitus is a common condition and affects millions of people worldwide. Tinnitus can be either subjective or objective. Subjective tinnitus is the most common type and is only heard by the person experiencing it. Objective tinnitus, on the other hand, is rare and can be heard by the examiner during a physical examination.