Why do some people sneeze when they go from inside a dark building to the sunny outdoors, while others don't?
550897
A search of the Internet yields a lot of sites that basically say that it's a known phenomenon, but science hasn't figured out why.\n\nThere is speculation that the optic nerve gets overloaded by the bright light and "leaks" onto the nerves that trigger sneezing.
188487
In the old days it was belived that when a person sneezed then they were expeling a demond from their body.  It was a common proper way to respond to a sneeze, blessing the person who had desposed of the demond.
314007
First of all not all people sneeze multiple times in a row.  The reason for sneezing is your body's primary defense against something trying to get in that shouldn't be there such as dust, pollen, bacteria, etc.  The little hairs in your nose are very sensitive and when something moves them it gets trapped inside and sneezing is how your body expels the invader from your nose or throat if it made it that far although coughing is usually more related to the throat.
1141521
This has been recognized in medical journals for at least 40 years, and is called different things, including the "photic sneeze reflex" and even the "ACHOO syndrome". In a few instances the reflex has been documented by shining bright lights at people to make them sneeze, so it probably really does happen. \n\nNobody is really sure why.  Apparently, somehow, the nerve pathway associated with sneezing is stimulated with the exposure to bright light.
381936
It is called a photic sneeze reflex.  It is believed the overstimulation of the optic nerve triggers a sneeze via a malfunction in nerve signals.
359903
they are not .Ever noticed In a crowdy place like in a movie hall when one person coughs or sneezes it start a chain reaction  thats because we deep in our concious know that it is agaist ettiqutes so when one person goes every other one gets an excuse.
623642
Some people are hypersensitive to sunlight.  This is not a true allergic reaction, but a reaction caused by photoreceptive nerve endings in the nose.\n\nI am afflicted by this, but so far it's just a little thing, nothing major.  Other things that cause me to sneeze include mint candies and cough syrup.  \n\nOf the three, cough syrup is the most problematic.  I have to make sure I'm not near anything that can't be cleaned because cough syrup really stains!
865737
If you just sneezed, 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.\n\nWhen the inside of your nose gets a tickle, a message is sent to a special part of your brain called the sneeze center. The sneeze center then sends a message to all the muscles that have to work together to create the amazingly complicated process that we call the sneeze.\n\nSome 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?\n\nIt is the job of the sneeze center 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!\n\nMost 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).\n\nDo 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.\n\nHave 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!
1008079
Because the pressure of the sneeze, you close your eyes. You can't control them because its something the body controls. Try holding your nose or biting your tongue though if you're about to sneeze. Then you don't.
88528
It is an involuntary reaction.  I wonder if it is to keep our eyes from popping out!  But, really, that's just how our brain directs our bodies during such a complex human action.  Do animals close their eyes when they sneeze too?
119554
From the website linked below: \n\nSince the detailed answer below got kind of long, I will summarize the main points up front. About 25% of people do actually sneeze when exposed to bright lights like the sun. We do not know exactly why this happens, but it might reflect a "crossing" of pathways in the brain, between the normal reflex of the eye in response to light and the sneezing reflex. There is no apparent benefit from "sun-sneezing", and it probably is nothing more than an unimportant (but annoying) holdover of evolution. \n\nRead the whole article for detailed information.
468529
no its not possible to sneeze without closing ur eyes coz its a reflex action that happenes
336844
A sneeze happens with tremendous speed and pressure, and you can feel it coming, if a ball is coming at you extremely fast, or anything for that matter, it's our instinctive response to close our eyes. I was in a car accident and as soon as the car went off the road, I closed my eyes, there was nothing else to do. We're just people.
754638
Quite a lot of people have bad allergies (to things like dust, pollen, and animal dander). Also, influenza is easily passed around, simply by being around a sick person's sneeze, or touching a faucet in a public bathroom (This applies to seasonal colds as well).
870320
ditto to the 2 answers above\n\nyou may get some peace from sneezing ect ... because you are relaxed\nbut you still CAN sneeze
51374
If you get dust or pepper up your nose.Or ifyou smell something you`re allergic to.If you have to sneeze but you can`t then look at something bright.
680079
Just relax.  This is probably just a sub-conscience reaction to not wanting to be heard sneezing.  Nobody should think differently of you as long as you make sure that your hands are clean.