Tinnitus

Tinnitus is the perception of noise or ringing in the ear, a common problem that afflicts one in five people. It's not considered a condition itself but rather is a symptom of an underlying condition though usually not a serious one.

Prevalence

 * 2018, 78%, as at 15th May 2018, of 92 members of the patient forum Science for ME reported suffering from tinnitus.
 * 2001, 48.5% - 52.1% of the 2073 patients in a Belgian chronic fatigue syndrome study reported tinnitus.