If you just sneezed, something was probably irritating or tickling the inside of your nose. Sneezing, also called sternutation, is your body's way of removing an irritation from your nose. When the inside of your nose gets a tickle, a message is sent to a special part of your brain called the sneeze center. The sneeze center then sends a message to all the muscles that have to work together to create the amazingly complicated process that we call the sneeze.
http://kidshealth.org/en/kids/sneeze.html
Most anything that can irritate the inside of your nose can start a sneeze. Common causes include dust, cold air, or pepper. When you catch a cold in your nose, a virus has made a temporary home there and is causing lots of swelling and irritation.
http://kidshealth.org/en/kids/sneeze.html
A sneeze, or sternutation, is a semi-autonomous, convulsive expulsion of air from the lungs through the nose and mouth, usually caused by foreign particles irritating the nasal mucosa. A sneeze expels air forcibly from the mouth and nose in an explosive, spasmodic involuntary action resulting chiefly from irritation of the nasal mucous membrane.
https://en.wikipedia.org/wiki/Sneeze
Sometimes, however, dirt and debris can enter your nose and irritate the sensitive mucous membranes inside your nose and throat. When these membranes become irritated, it causes you to sneeze. Sneezing can be triggered by a variety of things, including: allergens. viruses, such as the common cold or flu. nasal irritants.
http://www.healthline.com/symptom/sneezing
PubMed: Sneeze reflex: facts and fiction, When the Sun Prickles Your Nose: An EEG Study Identifying Neural Bases of Photic Sneezing, Sneeze related area in the medulla: localization of the human sneezing centre?.
http://www.webmd.com/allergies/allergy-education-17/video-anatomy-of-a-sneeze
If you sneeze with your eyes open, will your eyes pop out of your skull? Why do your eyes close when you sneeze? You're 5 years old, and word on the playground is that if you sneeze with your eyes open, they'll pop right out of your head. Given that you've got a nasty cold, this rumor is relatively terrifying for you. After all, what could be worse than your eyeballs shooting out of your face like bullets?
http://science.howstuffworks.com/science-vs-myth/everyday-myths/sneeze-with-eyes-open.htm
Using Your Sense of Smell to Trigger a Sneeze. 1  1. Smell some spices. Smelling certain spices can cause you to sneeze. 2  2. Sniff a bit of capsicum extract. Capsicum is naturally derived from hot peppers, and is used in both medication and pepper spray. 3  3. Sniff a fizzy drink.
http://www.wikihow.com/Make-Yourself-Sneeze
According to the UAMS’ Department of Otolaryngology/Head and Neck Surgery, your heart doesn’t exactly stop. When you sneeze, the intrathoracic pressure in your body momentarily increases. This will decrease the blood flow back to the heart. The heart compensates for this by changing its regular heart beat momentarily to adjust. However, the electrical activity of the heart does not stop during the sneeze. Cardiologist Dr. David Rutlen would agree with this logic. However, he says that when this change happens, the heart could momentarily stop. “This is something comparable to a valsalva maneuver,” Dr. Rutlen says.
https://uamshealth.com/healthlibrary2/medicalmyths/heartmyth/
Smell some spices. Smelling certain spices can cause you to sneeze. Try searching your cupboard for a bottle of spices, such as ground black pepper, cumin, coriander, or crushed red pepper. You can open the bottle and sniff the spices or use them in your cooking and inhale through your nose as you add them.
http://www.wikihow.com/Make-Yourself-Sneeze
Open a stick of peppermint gum. Some people sneeze from smelling peppermint. If you have some mints or peppermint gum around, then try popping one in your mouth. Inhale the scent as you enjoy the gum or mint and it may cause you to sneeze.
http://www.wikihow.com/Make-Yourself-Sneeze
what happens in head when you sneeze
When you sneeze a message is sent to a special part of your brain called the sneeze center.