Just found this on a website :
''
Two things that commonly keep the sinus from draining well are tobacco smoke and dryness. Nicotine paralyzes the cells that sweep out the dust and germ-laden mucus, and dryness makes that mucus drier and stickier. When you're outside in a hot and dry place, the mucus in your nose turns dry, hard, and sticky. Your sinuses are designed to move moist, liquid mucus; not rocks. If the opening to the sinus is blocked by one of these chunks of dried mucus, the problems get worse quickly. Cells that produce mucus keep on doing so, even when the sinus doesn't drain normally. This increases pressure, and the pressure causes pain. And, a pool of stagnant mucus in your sinus is ripe for infection. There's nothing more appetizing to a germ than a pool of stagnant mucus. Yum! ''
Another reason to drink the water! xxx