Nasal congestion on waking... A few possible causes, but a lot of them are ruled out. [more inside]
posted on Jan 13, 2007 - 13 answers

What's the difference between green snot and yellow snot? [more inside]
posted on Dec 4, 2006 - 20 answers

Why is it I seem to get head colds so easily? [more inside]
posted on Oct 4, 2006 - 35 answers

For the past two days, I've heard and felt repeated popping noises/sensations in my nose, sort of like I shoved some pop rocks up there (I didn't) . Yesterday, they were distracting; today, they are slightly painful and coupled with a miserable sinus headache. What the hell's going on up there? [more inside]
posted on Feb 22, 2005 - 8 answers