what causes constant ringing in the ears?
Tinnitus is the medical term for ringing in the ears. According to PDR Health, Tinnitus is,âa condition in which people hear constant or periodic sound not caused by an outside source. The sound can also be described as a ringing, buzzing, or clicking noise that occurs inside the head. Ringing in the ears can be heard in one or both ears, and in the head, and its pitch may be low or high.â.