Why do some of us SNEEZE when looking into the SUN?
402647
It is not the sun that is stopping you from the sneeze, it is the position of your head. you can look at the moon or a a piece of key lime pie that is floating in the sky and have the same result.
190467
Sneezing is actually a reflex action to a stimuli.The nerves send the message to the brain and then you sneeze. During sleep the reflex part of your brain rests too. The irritant still annoys the nerves but  no message is sent to the brain. However if the stimuli builds the irritant to  a level registered as pain the brain will wake you and you will sneeze (but to have this part of your brain working  you need to be awake!!)Scientific Fact! :)
538672
due to the sudden jerk you get while you sneeze, you automatically make you body tight and then suddenly it becomes loose. thus the blood pressure increases. \nSometimes people feely giddy due to a sudden and big sneeze. this is because, the brain cannot coincide with the blood pressure. thus it happens. but remember this is all just for quite a fraction of a second. \n\nHope it was clear enough.
653337
Photic sneeze reflex (also referred to as sun sneezing and whimsically called ACHOO, a backronym for Autosomal dominant Compelling Helio-Ophthalmic Outburst) is a medical condition by which people exposed to bright light sneeze. It has been suggested that the photic sneeze reflex occurs only after someone has been adapted to the dark for at least five minutes, although this is not certain, and is not uniform amongst people with the photic sneeze reflex. The photic sneeze reflex can also cause one to sneeze many times consecutively. The condition occurs in 17% to 25% of humans with more common occurrence in Caucasians than other human races. The condition is passed along genetically as an autosomal dominant trait.
406470
Wow. I don't believe someone asked this.\nMy ex-husband had this problem everytime he went outside.\nIt was years before a doctor didn't look at him like he was nuts and gave him a real answer.\n\nApparently there is a nerve that runs across the bridge of the nose.  In most people it is located such that there is no problem.  In other people the nerve is only millimeters in a different location.\n\nWhen he went out into the sun the squinting of his eyes due to the sudden increase in light irritated that nerve and caused a sneeze reaction.\n\nHope that helps.  My ex is still nuts, but that's another story! lol
664207
http://en.wikipedia.org/wiki/Photic_sneeze_reflex
232297
A sneeze is the fastest known action that a human can perform.  It is involuntary and can make the head mover VERY sharply.  Maybe our eyes close so that we don't get anything in them when our head jerks forward?  Dust, leaves, branches, etc. would be both painful and dangerous if they got into our eyes while we were moving our head at high speed.\n\nAccording to Wikipedea:\nIt is almost impossible for a person to keep their eyelids open during a sneeze, although some rare individuals report having little if any trouble doing so. The reflex of shutting the eyes serves no obvious purpose: the nerves serving the eyes and the nose are closely related, and stimuli to the one often trigger some response in the other.
1003908
my nose, when I sneeze
1458
Researchers aren't sure exactly why the sneeze reflex happens, but whatever neurological message tells the eyes to close probably comes from a primitive part of the brain called the medulla oblongata in the brain stem.
493240
closing your eyes is a natural reaction to many events.  if someone blows in your eye, you will naturally try to shut them.  sneezing elicits this response because you are going through a spastic motion and there are lots of particles being hurled into the air.  it is hypothesized that we evolved this reaction to sneezing to keep those particles out of our eyes.\n\nsneezing involves releasing the air in your lungs at very high velocity.  for the most part, your nose and mouth can expel this gas before the pressure in your sinuses gets to a point that it causes your eyes to pop out.\n\nyour eyelids alone can't prevent your eyes from popping out.  try to close your mouth, nose and eyes as tight as you can and see how the air gets out.  also tell the doctors at the emergency room
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.
72870
Sounds to me like you've got a condition called photic sneeze reflex.
370361
Probably because your face contorts (even if only slightly when the light source is mild), and that adds to the irritation in your nostril, triggering off a sneeze.
162788
Tidbitonebox7 is on the right track.  The nerves that serve your eyes and nose are very close together, and strong stimulation of one can affect the other.  So, if you get a strong light stimulation in your eyes, it can affect your nose nerves and cause you to want to sneeze.  There are similar affects and effects throughout the body.
927265
This is because when you leave the theater and go out to the bright sunlight, you will see that the dust is more outside so you sneeze.
894281
No, I sneeze all the time.\nb
419888
hey read these scientific reasons why do people bless them:\n1- when you are sneezing the heart stop within it\n2- the sneeze's speed is 100 km&#92;h\n3- if you are sneezing hard maybe you will broke one rib of your body ribs\n4- if you block the sneeze maybe will happen blood throwback in the neck or the head then that will be your death\n5- if you lift your eyes opened within sneezing maybe they will be out of them place\n6- and for your knowledge :\n   within the sneeze all organ of body stop although the time of the sneeze a second or part of second\nthen if god (Allah ) wants you to live,he will let our organ work after stopped \nquestion to you : if don't believe in spirit what the thing let you live ,think and distinguish you from the animals?