Another natural method that may help you find relief from environmental factors behind your post-nasal drip is by inhaling steam (safely!), Dr. Mayerhoff says. He says you can do this by boiling a bit ...

When mucus is thin, your sinuses naturally clear out. But when the mucus becomes thick and blocks drainage, the sinus pressure builds, causing pain associated with a sinus headache, Reddy says.

If you are severely congested, here's one move to clear a stuffy nose. It works so well, you'll want to bookmark this video.