Sinusitis

This common condition interferes with the way mucus normally drains, and makes your nose stuffy. Breathing through your nose may be difficult, and the area around your eyes might feel swollen.

Symptoms:

Nasal inflammation
Thick, discolored discharge from the nose
Drainage down the back of the throat (postnasal drainage)
Nasal obstruction
Ear pain
Aching in your upper jaw and teeth
Cough or throat clearing
Sore throat

Prevention

Avoid upper respiratory infections. Minimize contact with people who have colds. Wash your hands frequently with soap and water.
Manage your allergies.
Avoid cigarette smoke and polluted air.