What to do if you have nasal congestion? What's good otc?

Congestion. Saline nasal spray or gel moisturizes nasal passages & helps remove mucus as well as bacteria/viruses. If ambient air is dry, running a vaporizer will help loosen mucus. If sinuses ache or have pressure or ears feel "full", an otc decongestant like sudafed may help. (caution if you have high blood pressure; decongestants can raise it.) afrin spray ok for 2-3 days max (same about bp).