Sneezing is a mechanism your body uses to clear the nose. When foreign matter such as dirt, pollen, smoke, or dust enters the nostrils, the nose may become irritated or tickled. When this happens, your body does what it needs to do to clear the nose — it causes a sneeze.

Why do I sneeze 3 times in a row?

So why do we often do it in threes? While a single sneeze is sometimes enough to clear whatever irritant out of your system, the triple sneeze, according to Live Science's Laura Geggel, happens when we need to get deeper irritants out.

Why do I sneeze like 20 times in a row?

Rather than sneezing once or twice, some people do so again and again. My partner often sneezes 20 or 30 times in succession. Is this common, and is there any explanation? There is a little-known condition called photic sneeze reflex, or autosomal compelling helio-ophthalmic outburst (ACHOO) syndrome.