Why is it very difficult to close our mouth when we sneeze?
486726
its not very difficult. Sometimes if i jaz feel like it i sneeze with my mouth close. Then all of the things inside my nose flies away. And also i can sneeze with my eyes open. \nIt is more dificult to not yawn if you see someone yawn in front of you.
314007
First of all not all people sneeze multiple times in a row.  The reason for sneezing is your body's primary defense against something trying to get in that shouldn't be there such as dust, pollen, bacteria, etc.  The little hairs in your nose are very sensitive and when something moves them it gets trapped inside and sneezing is how your body expels the invader from your nose or throat if it made it that far although coughing is usually more related to the throat.
722090
When you sneeze every muscle in your body tightens, The muscle in your eye might be more sensitive to the sudden spasm
370361
Probably because your face contorts (even if only slightly when the light source is mild), and that adds to the irritation in your nostril, triggering off a sneeze.
315239
Your eyes are forced shuh by a part of the brain that refuses to look at the booger bits that go flying out when you sneeze.\n\nYou have overcome it looking at stuff like go-at-se until that part of the brain just gives up.
538672
due to the sudden jerk you get while you sneeze, you automatically make you body tight and then suddenly it becomes loose. thus the blood pressure increases. \nSometimes people feely giddy due to a sudden and big sneeze. this is because, the brain cannot coincide with the blood pressure. thus it happens. but remember this is all just for quite a fraction of a second. \n\nHope it was clear enough.
315604
We have little choice in the matter. Try and hold them open the next time you sneeze. It's virtually impossible.
91168
Just say bless you, and ignore it.  Hand out tissues if it helps.  \n\nThere is honestly nothing else you can do- you can't stop a sneeze.  Anything you would say to try to get people to "sneeze more quietly" will just end up making you look like a cad.
323959
Usually the sneezing relex make your eye lids to close.
191230
Actually, yes it can be dangerous. Holding in a sneeze can force bacteria into your ear, and can even cause your eardrum to rupture. In addition, it can cause chest pain, and stress on the throat. In other words, if you have to sneeze, let it out! In class you might want to sneeze (or cough) into the bend of your elbow. It's the best place. Coughing or sneezing into your hand spreads germs.
80603
because scientists studied that if you dont close your eyes when you sneeze your eye balls pop out.
149715
It is almost impossible for a person to keep their eyelids open during a sneeze, although some rare individuals report having little if any trouble doing so.\n\nThe sneeze center makes all these muscles work in just the right order, to send that irritating particle out of your nose -- at speeds up to 100 mph
188701
Changes in breathing (rapid inhalation/exhalation) and heart-rate might be linked to it somehow. That might explain the venous involvement...something to do with circulation perhaps which is aggravated by the sneezing fit?
389251
I don't think so, and I've never heard this before.  I have heard that your heart stops momentarily when you sneeze though.
309795
It is the strain of sneeze.
871528
I doubt it can damage your brain.  But it is bad for you.  You sneeze to expell germs or something irritating your sinuses, so not allowing yourself to sneeze ("closed mouth") allows that germ or whatever to stay inside.  Just let yourself sneeze!
59078
Many people thought that sneeze is impolite, it's true if you do it on purpose. But it is natural and it is good because when you sneeze bacteria that try to come inside your lung will come out. Try to cover your mouth and nose when you feel, you will sneeze.