None of the sounds I have are constant. Some are there most of the time. Some are there only occasionally. Some are there, very noticeably for a few weeks or a month or more, but then fade more into the background. Volume and pitch change, also. I also keep getting new sounds every so often. It still hasn't been determined what caused my tinnitus, but it's likely due to antidpressant withdrawal and extreme stress. It may also have something to do with my new antidepressant. Does anyone have any info on what can cause tinnitus to be very changeable? Is it likely to stay being so changeable, or does it tend to eventually settle? If you keep getting new sounds, are you likely to do so forever? Or does it tend to level off at a certain point?