Mucus is made by mucosal glands that line the body's respiratory tract, which includes the nose, the throat and the lungs, Lebowitz said. Related: Why do we sneeze? Most of the mucus that people sneeze out comes from the mucosal glands lining the nasal passages, Lebowitz said.

Why does the body produce mucus?

Mucus protects your respiratory system with lubrication and filtration. It's produced by mucous membranes that run from your nose to your lungs. Every time you breathe in, allergens, viruses, dust, and other debris stick to the mucus, which is then passed out of your system.

How do you remove mucus from your body?