Why Do We Have Boogers?

Words to Know

Mucus

The sticky slime your nose makes to trap germs and dust

Your nose makes a cup of mucus every day!

Germs

Tiny living things that can make you sick

Mucus traps germs before they get inside your body.

Cilia

Tiny hairs in your nose that sweep mucus toward your throat

Cilia work like tiny brooms to keep your nose clean.

Evaporate

When water turns into invisible gas and floats away

When water evaporates from mucus, it becomes a booger.

Check What You Learned

Fun Facts

• Boogers (nasal mucus) are produced by mucous membranes in the nose. The human nose produces approximately 1 cup (about 240 ml) of mucus per day.

  Source: American Academy of Otolaryngology

• Mucus traps dust, pollen, bacteria, and other particles, preventing them from reaching the lungs.

  Source: NIH/NIDCD

• Mucus contains antibodies and enzymes (like lysozyme) that help neutralize bacteria and viruses.

  Source: American Lung Association

• When mucus dries out (water evaporates), it combines with trapped particles to form boogers (dried nasal mucus).

  Source: Cleveland Clinic

• Tiny hairs in the nose called cilia sweep mucus toward the throat, where it is swallowed and destroyed by stomach acid.

  Source: National Institutes of Health

• Picking your nose can cause tiny abrasions in the nasal lining, increasing the risk of infection. Blowing with a tissue is the recommended method.

  Source: Mayo Clinic