Why Does Sunlight Make Some People Sneeze?

Why Does Sunlight Make Some People Sneeze?

Achoo! Most people sneeze after a tickling sensation finds its way up their nose, but for some, sunlight is another triggger. This is called photic sneeze reflex, otherwise known as solar sneezing. For somewhere between 20 and 30% of the population, exposure to bright sunlight directly after being in a dim area causes sneezing. This reflex is a genetic quirk -- a dominant genetic trait to be exact. The first reported case of this was recorded by philosopher Aristotle in 350 B.C., but research wasn't done on the phenomenon until 1964.

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