Sheeple, I had the same thing . Finally figured it was a sinus infection. What I did was go on grapefruit seed extract, irrigate sinuses,( water pix attachment) with c silver, drank 3 bottles of barefoots maximum restore, and 2 bottles of air restore. It's GONE!!! I'm still amazed at how deep a breath I can take, and no cough. Not sure if you have to do all of these things, I have a feeling that the maximum restore did the most.