What is level 4 tinnitus? I've never heard it classified that way and a google search didn't reveal any answers.
Mine is variable, sometimes it is not there at all, most of the time it is mild, but sometimes it is moderate. I find it easy to ignore most of the time.
I've tried to figure out what makes it vary, foods, drinks, atmospheric pressure, relative humidity, moon phases, and a host of other things suggested to me, but there seems to be no rhyme or reason.
I limit my caffeine to one cup of tea per day, and it's decaf after that. I've never added salt to foods, my alcohol consumption is very mild, but I do eat a little chocolate from time to time. None of the above seem to have any effect on it most of the time, but on rare occasions the tea or chocolate will raise the volume a bit.
Actually, I could care less about the tinnitus, I just wish there was some way to improve my high frequency hearing.
Bob