Add Yahoo as a preferred source to see more of our stories on Google. Yellow snot is gross, but does it mean you have an infection? Here's everything you need to know about it. Snot, mucus, phlegm ...

When you're sick you'll often produce more phlegm, and might notice it's thicker or a different color: white, green, yellow or maybe even brown. We all produce mucus, even when healthy. Mucus is a ...

Make your own slime and learn more about the many kinds of mucus in a hands-on SciFri education activity! Without mucus, you couldn’t blink, swallow, smell, or taste. You couldn’t digest your food, ...

Mucus consists mainly of water and a gel-forming molecule called mucin. The body uses mucus to protect tissues, remove particles, and prevent infections. Mucus is essential for the functioning of many ...

Mucus is a normal part of the lungs. But smoking and other issues can cause too much mucus to collect there. (Photo Credit: iStock/Getty Images) Your body makes about a liter (approximately 1 quart) ...