Why do we sneeze when going from dark to light? Many people, myself included, often sneeze when they leave a dark building and enter the bright sunlight. Please explain.

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Scott D - ex-QnA

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mrbuddhafreak

It's called the photic sneeze reflex. It's a genetic trait that appears in up to 37% of people.

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sadiepotatie in a smitten COAT

I always look at the light when i have a sneeze that is refusing to come out!

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