The photic sneeze reflex (also known as, Autosomal Compelling Helio-Ophthalmic Outburst (ACHOO) and colloquially sun sneezing) is a condition that causes 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.
can looking into the sun make you sneeze? can looking at the sun make you sneeze?