Eli5: What happens when you sneeze? And why does it happen multiple times?

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I’m one of those weirdos that enjoys a good sneeze, but I don’t understand what happens when you sneeze. Why does our body react in such a way? And why do we have it built into our systems? And why do they often come in multiples?

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6 Answers

Anonymous 0 Comments

I love a good sneeze so I guess I’m one of those weirdos too. Basically, the purpose of sneezing is to protect our respiratory systems from potentially dangerous things we might have breathed in. When you feel that tickle inside your nose, it usually means there’s a foreign particle like dust, dirt, or a pet hair touching the inner lining of of your nasal passages. To protect your body from possible harm, your sneeze reflex is triggered. When you sneeze, a powerful blast of air is sent rushing out of your mouth and nose in order to expel any irritating particles or blockages from your breathing passages. Whatever was irritating your nose ends up getting dislodged and expelled by the blast of air. Sneezes often come in multiples because the first sneeze wasn’t able to expel the irritant, so you keep sneezing until the irritation is no longer present.

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