Why is it that when you're outside you look close to light or the sun and sneeze!
Question:
Why is it that when you're outside you look close to light or the sun and sneeze?
Answers:
It's called "Photic Sneezing."
Apparently, it's caused by a genetic mutation, a "dominant" trait, occurring anywhere for 15-25% of the population. The exact gene or genes responsible for this have not yet been identified.
Exactly how and why this mutation causes the sneeze reflex, due to exposure to bright light, is a mystery. One theory is that nerve signals from the pathway that controls contraction/dilation of the pupils, get confused by the brain stem, and end up triggering the sneeze reflex as well.
Sneezes, in this case, may also be triggered by hot or cold temperatures, or by intense odors, in some people.
Hope that makes sense,
~W.O.M.B.A.T.