If your mucus is gray or black... …you likely inhaled dark-colored particles, like smoke from a fire or heavy exhaust.

This cold and flu season, you may be looking for clues you're getting better anywhere you can find them, even in the color of ...

It’s that time of year again, when everyone’s fighting a cold and blowing their nose. Maybe you’ve found yourself having sinus struggles, or you’ve noticed your boogers don’t look “normal.” Whatever ...

When a white blood cell finds a germ, it latches onto it. Then it changes its shape to surround the germ. You can imagine the ...

In general, you want to keep mucus thin, which will help it drain from your nose. Over-the-counter drugs, nasal washes, and positional adjustments may also help. Steam thins mucus and soothes ...

First, it’s important to know that fish are covered in a thin layer of mucus. This slimy coating (it is also called a “slime coat”) is known to keep fish healthy by warding off pathogens.

Michael Smith, MD You can use those as often as you want -- help moisturize your nasal passages and keep that mucus thin. Michael Smith, MD Nasal Irrigation is a great one as well. You may know it ...

He recommends paying more attention to the consistency of the mucus — whether there is thick pus or not — to know if you have a sinus infection. For example, thin mucus may be a sign of an ...