why do we sneeze and what make us sneeze?

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  • 1 decade ago
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    We sneeze because something was probably irritating or tickling the inside of your nose. Sneezing, also called sternutation, is your body's way of removing an irritation from your nose.

    When the inside of your nose gets a tickle, a message is sent to a special part of your brain. This area of the brain then sends a message to all the muscles that have to work together to create the amazingly complicated process that we call the sneeze.

    Some of the muscles involved are the abdominal (belly) muscles, the chest muscles, the diaphragm (the large muscle beneath your lungs that makes you breathe), the muscles that control your vocal cords, and muscles in the back of your throat. Don't forget the eyelid muscles! Did you know that you always close your eyes when you sneeze?

    It is the job of this part of the brain to make all these muscles work together, in just the right order, to send that irritation flying out of your nose. And fly it does - sneezing can send tiny particles speeding out of your nose at up to 100 miles per hour!

    Most anything that can irritate the inside of your nose can start a sneeze. Some common things include dust, cold air, or pepper. When you catch a cold in your nose, a virus has made a temporary home there and is causing lots of swelling and irritation. Some people have allergies, and they sneeze when they are exposed to certain things, such as animal dander (which comes from the skin of many common pets) or pollen (which comes from some plants).

    Do you know anyone who sneezes when they step outside into the sunshine? About one out of every three people sneezes when exposed to bright light. They are called photic sneezers (photic means light). If you are a photic sneezer, you got it from one of your parents because it is an inherited trait. You could say that it runs in your family. Most people have some sensitivity to light that can trigger a sneeze.

    Have you ever had the feeling that you are about to sneeze, but it just gets stuck? Next time that happens, try looking toward a bright light briefly (but don't look right into the sun) - see if that doesn't unstick a stuck sneeze!

    Hope this information helps you.

  • 1 decade ago

    We sneeze as a result of some sort of irritant being in the nasal cavity. As the irritant contacts several of the hairs inside the nose, your body reacts by expelling air at a very high rate of speed to rid the nose of the irritant.

    As a side note, when we sneeze, the air that comes out of the nose and mouth is travelling at around 100 mph.

  • Anonymous
    1 decade ago

    Age makes us develope allergies. if you can afford an allergist you can see it quicker. The way to find out is living habits, foods, and furniture. Molds and dander are the most common cause of allergic sneezing. Try vacumming daily and dust every day. Next have your pets stay with a trusted person for a week after all vacuuming. and check for leaks near carpets because molds can cause allergies. A new mattress and furniture can help. Sad to say our beloved pets can be a source but dust mites can be part of the blame. Invest in a great vacuum and new carpet. after a bit of cleaning and hard work maybe your pets are not the blame

    Source(s): experience, and i tore our carpets out and kept the pets. Make sure the "Pet" is not a smoker too
  • 1 decade ago

    we sneeze to get out whatever dust or smell our bodies can't handle. Dust, Pollen, whatever you're allergic to, etc.

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