There’s not a whole lot to debate here. Sneezing typically expels foreign objects from the nasal passages. Simple enough, but, as always, there are some cases that just don’t seem to fit:
- The sun makes some people sneeze.
- Some people sneeze after orgasm.
- Most people sneeze when they’re sick.
- Allergies make people sneeze.
So for allergies and colds, a sneeze is basically a reflex to the mucus or congestion that is there in the first place. So it makes sense that you would sneeze when your nose is irritated. But why is the mucus there in the first place? Well, the mucus and congestion restricts air flow, which would cause the pressure of the system [your brain] to rise. So is a cold just low brain pressure?
People do get sick when they go to high altitudes. Why does that matter? Because that’s the same as taking your brain to a lower pressure environment.
We also get sick most frequently when it’s cold outside. So if it gets cold suddenly, the brain pressure may be low. Think about your tires in cold weather. The only difference is that your tires can change volume, your brain can’t.
Why in the world would you sneeze after an orgasm?
I think it’s safe to say that an orgasm is relaxed as you’ll be in any given day, aside from sleeping. We’ve correlated brain activity to stress, so the lack of brain activity would coincide with relaxation. And if stress means high brain pressure, relaxation means low brain pressure. If the change in pressure is too great, it could simulate a pressure event in your brain similar to a cold, so you would sneeze to expel air and normalize pressure.
Why would you sneeze during or after a workout?
See previous answer.
If that’s true, why does the sun make some people sneeze?
First off, this condition only affects 18-35% of the population. More interestingly, white people make up 94% of the sun sneezing population.
Let’s go back to Bates. Didn’t he say something about sunlight?
Sunlight relaxes the mind? Yes. That’s where is all started. Bates used to have people stare directly into the sun, and claimed that it helped their vision. I’m not saying that. Lets just say that the sunlight relaxes you. Find your own study here. Or read my article on how to improve your vision, and how staring off into a single point at a distance helps relax your mind.
So pick your own reason why. The sun relaxes your mind. Period. And with that assumption:
If we can assume that sunlight relaxes the mind, a stressed mind would be considered high pressure. You’re stressed at school, and you walk outside. The sun, the outdoors, the distance-whatever- relaxes you. It lowers your stress, and decreases the temperature and pressure of your brain. Since your brain’s reflex is to normalize pressure, the fastest way to re-pressurize is to expel air. So you sneeze.