A sneeze happens when something like mucus, a tiny object, or an allergen interacts with skin or the tiny hairs that line your nose. Sneezing is a mechanism your body uses to clear the nose. When ...

Your body makes you sneeze when it senses something in your nose that shouldn’t be there. This can include bacteria, dirt, dust, mold, pollen, or smoke. Your nose might feel ticklish or uncomfortable, ...