Phlegm buildup in the lungs and throat is a common problem, especially during colds, allergies, pollution exposure, or respiratory infections. Phlegm is a thick mucus produced by the respiratory ...

Elephant Snot isn’t the answer. Saguaro National Park officials tested a viscous product — with the odd brand name of Elephant Snot — to remove graffiti from saguaros at the park. It didn’t work.

Mucus is a thin, slippery fluid that lines the nose, throat, and other passages to trap dust and germs. Phlegm is a thicker type of mucus produced in the lungs to catch and remove harmful particles ...