I was having a lot of this, back and forth, on an doff, never really going away.
Then I checked my vitamin C intake and found that the measely amount I was getting in my big multi-vite every other day or so was not much at all. So I bought some 1000mg tabs of C, started taking 1 per day... and within 48 hours I felt 95% better, and it's still working 3 weeks later. All that nasty gummy sinus stuff and sore throat went away pretty fast.
Maybe a coincidence....maybe not. Cheap enough and safe enough to try it out though! :)

