This has been happening on and off for a few months. When I blow my nose or even roll over on my left side I get a sharp pain in my left nostril, like someone is pulling the hairs out one by one. It makes the entire left side of my head shoot with pain and tingle, my eyes water, and I flinch. My doctor, whom I have a feeling didn't know what to make of it, says it could be allergies. But there are times when it will be fine and no symptoms, other times when I can't even touch my nose without setting it off. Although it does run, simply because it's so cold outside, the color is clear, so I know that it can't be an infection. Any help would be greatly appreciated.