Hi, I have been having sinus problems due to allergies on and off for a couple of years, but it always seems to clear up on its own. A couple of months ago I started getting vertigo when I change my head position suddenly, like when I lay down or bend over. My allergies have gotten worse recently with the weather changes and now I have broken out in a rash on my forearms and my back that won t go away. It s been several weeks now and the rash seems to start to get better, but then just comes right back. Could this all be related to a sinus infection?