ACHOO syndrome causes uncontrollable sneezing from sunlight, camera flashes, and more. Evidence suggests that scientists have been trying to understand the cause as far back as 350 BCE. ACHOO syndrome ...

When you step outside from a dark building into the full glare of the sun, do you suddenly have the urge to sneeze? If so, you're not alone — as many as 1 in 3 people display this reaction. This ...

Have you ever looked at a bright light or the sun (a pretty bright light) and had to sneeze? If so, you have been blessed genetically with the ACHOO syndrome or photic sneeze reflex (PSR). The acronym ...

As a teenager, Manuel Spitschan discovered that just like his father, if he felt the urge to sneeze, looking at bright light could induce it. What seemed like a funny family quirk is actually rooted ...

Why do people sneeze with their eyes closed? Is there a way for people to sneeze with their eyes open? – Carlos, 11, Riverview, Florida Aaaaa-choo! While your first thought may be to say “Gesundheit!” ...

I don’t have hay fever, but based on how I react to walking outside on a hot day would convince you I do. For some reason, getting off the train into the sun, opening my door onto a sunny vista, and ...

Sneezing is a slightly annoying but normal part of life. Whether you are battling a cold, outside during allergy season or in a dusty room, we've all had a case of the "achoos." Sometimes, the buildup ...