Characterized by wild amounts of pain in the face or like a headache, postnasal drip, and really disgusting colored snot (think the yellow and green on your can of Mountain Dew).

This condition may happen to one or more of the facial sinuses. It can be caused by abnormalities in the sufferer's physiology (small sinus clearing passageways), the common cold, and-or blowing your nose too hard.

Try a couple Sudafed, a couple Advil, and a humid environment (like sticking your head over a bowl of really hot water). Don't use affrin-type stuff; the rebound effect will murder your sinuses.

Oh, and this condition really, really hurts. Infection of the upper sinuses leads to monster headaches, infection of the lower sinuses causes toothaches and facial pain. So be careful when blowing your nose.