<Tr> <Th> DiseasesDB </Th> <Td> 30910 </Td> </Tr> <Tr> <Td_colspan="2"> (edit on Wikidata) </Td> </Tr> <P> The photic sneeze reflex (also known as photoptarmosis, Autosomal Dominant Compelling Helio - Ophthalmic Outburst Syndrome (ACHOO) and colloquially sun sneezing) is a condition that causes variable difficulty to control sneezing in response to numerous stimuli, such as looking at bright lights or periocular (surrounding the eyeball) injection . The condition affects 18 - 35% of the population in the United States, but its exact mechanism of action is not well understood . </P> <P> The photic sneeze reflex manifests itself in the form of uncontrollable sneezing in response to a stimulus which would not produce a sneeze in people without the trait . The sneezes generally occur in bursts of 1 to 10 sneezes, followed by a refractory period that can be as long as 24 hours . </P>

Why do you sneeze if you look at the sun
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