Tinnitus -didnt know it's called this

It's been like 20 years + i think to some sort of degree we all sometimes do hear this 'ringing in th ears'. 

Sometimes it goes away. I guess it's mild if it's just there and annoying sometimes.

Tinnitus is the term for hearing sounds that come from inside your body, rather than from an outside source. It's often described as "ringing in the ears", although several sounds can be heard, including: buzzing. humming