ringing in ears

Can anyone tell me, if its a side effect to have permanent ringing in both ears.. I have had Menieres disease for 19 years, and now my ears are ringing all the time.

my left ear always rings always

Are you just now noticing ringing in the ears after 19 years of MD?  If so, you have been VERY lucky all these years.  Tinnitus is a classical symptom of MD.  Have you seen your ENT about it?