Applying heat to the face can help relieve sinus pressure and loosen mucus from the outside in.

To clear mucus from the back of the throat, mix 1/4 to 1/2 teaspoon of salt in a glass of warm water and gargle for 30 seconds. The salt helps draw out excess fluid and thin the phlegm. 4. Adjust Your Sleeping Position

Mucus is 95% water. When you are dehydrated, that remaining 5% becomes a thick, gel-like glue.

These methods provide the fastest relief by physically clearing the nasal passages.

Before you treat it, understand what is happening inside your head.