A sneeze (also known as sternutation) is a semi-autonomous, convulsive expulsion of air from the lungs through the nose and mouth, usually caused by foreign particles irritating the nasal mucosa. A sneeze expels air forcibly from the mouth and nose in an explosive, spasmodic involuntary action.
When you sneeze, it removes irritants like dirt, dust and pollen from your nose or throat. It’s your body’s way of getting rid of things that can make you sick or cause inflammation.
When this happens, your body does what it needs to do to clear the nose — it causes a sneeze. A sneeze is one of your body’s first defenses against invading bacteria and bugs.
People sneeze if the brain senses an intruder, like an allergen or pollutant, in the nasal passages. Bright light and even large meals can trigger sneezing.
Most people only sneeze two or three times when exposed to sunlight, but there have been records of people sneezing up to 40 times in a row. The interesting thing is that light itself does not trigger a response.
When you feel a sneeze coming on, there’s not much you can do to stop it—especially if you’re suffering from a cold or seasonal allergies. And you can’t control how loud you sneeze, try as you might.
But have you ever stopped to think about why we sneeze or what’s happening inside your body when it happens? Let’s explore the fascinating anatomy of a sneeze and how this seemingly simple act plays a crucial role in keeping you healthy.
The Anatomy of a Sneeze: How Your Body Defends Itself in Seconds