why is it that  your nose never itches until your hands are dirty?
477271
The Murphy's law is a large part of it. Usually it is more the idea of your sub-concious. When your hands are dirty your sub-concious starts thinking about how you would scratch your nose with your hands being dirty. As you passively think this in your mind your body becomes fine tuned to anything happening on your nose. Basically, your body is reacting to a fear that your nose will itch when your hands are dirty.
309689
it helps prevent (doesnt completely block) the germs from flying over the entire room or onto other people around you, but do know that if you dont wash your hands right after sneezing you are spreading the germs that are then on your hand.  it is reccomended to sneeze into a tissue or a handkerchief to prevent the spreading of germs.
328098
Our skin has a defense system that makes us aware of annoying things that touch our body. Sometimes that annoying thing is just a fly. But sometimes we come into contact with something like poison ivy that causes a reaction in our skin. Poison ivy or bug bites cause an allergic response that keeps our skin itchy for a while.
576439
How come your feet smell, but your nose runs???
1158813
If the discharge from your nose is crystal clear, it's probably allergies.  If its yellowish, it could be a cold.  If it is allergies it could be from either outside(the weeds) or inside(are there any new carpets?)
850003
It means that they have a sense of humor,  my dad says this to me all the time.  It is cold and flu season, who wants someones nasty hand on their mouth.  Does everyone always wash their hands after going to the bathroom or scratching,?  ewe, I don't even want to think about it.
893134
the hair in your nose block dust particles and pathogens from entering into the nasal cavity. they work along with mucous in trapping these particles so they cant cause infections or irritation.\nkind of like eye lashes help keep stuff out of your eyes
1178370
as air moves throgh yoour body it gets warmed and moistened  the nose and nasal cavity are lined with a sticky  substance called mewcus (boogers) ,therefore as air passes through  the nose all the dirt in air gets filtered,so that u dont get sick. air that passes throgh the mouth is not cleaned this way.
881151
Why do our noses run?\nOur cough reflex is not the only way we have to protect our airways. Most of the time we breathe through our noses. There are several folds and ridges at the back of the nose, on the way to the throat and windpipe, which are covered with mucous membranes. These membranes secrete mucus, a thin but slightly sticky liquid. As the air we breathe passes over these folds and ridges, it is humidified by evaporating water from the membranes and mucus, and many of the dust particles present in the inhaled air stick to the mucus so they cannot continue to the lungs. (Mucous membranes also line the windpipe and airways and help to trap smaller dust particles, and there are microscopic hairs, known as "cilia", on the surface of the lung's mucous membranes that continuously "sweep" the dirty mucus up through the airways and toward the windpipe where you can cough it all the way out.) \n\nSometimes, when our noses and lungs are irritated by something in the air, our mucous membranes will produce more mucus to help pick up and clean out the irritants. This can also happen when we breathe in something that we are allergic to: the allergic reaction of the mucus membranes to the offending material makes the membranes produce a lot more mucus, and a lot of extra water enters that mucus because of the allergic effect on the membranes. Unfortunately, the excess mucus and water makes you very uncomfortable and doesn't do any better as far as self-cleaning goes. \n\nViruses can also attack the mucus membranes and cause extra watering and extra mucus production. This, in fact, is how the common cold occurs. The virus is spread from person to person through droplets in the air or on hands: remember that there's a lot of extra liquid around with all the irritation, and a lot of that is sprayed into the air every time you cough or sneeze. Other people who breathe those droplets may be infected also, since the droplets will be caught on their mucus membranes. Once you've been infected by a particular cold virus you'll be immune to it forever, but there are hundreds of cold viruses around for you to catch, and there'll almost always be a few around that you haven't had yet. Since, as with the vast majority of viruses, there are no medicines we can use to kill cold viruses, when we get a cold we have to wait it out, possibly with medicines to relieve some of the misery.
700504
Okay here is an answer from your friendly respiratory therapist. when you breathe you do so through your nose, at least you should, humans are nose breathers.  We do this because right beyond your nose is a body part called the concha which in simple terms is like a palm tree full of blood vessels and tissue, etc to naturally warm up, filter and hydrate the air you breathe in so when it gets to the lungs its is as warm, clean and damp as possible.  Now when you blow your nose you blast that nasal concha with hurricane force winds and the crap on it comes off, sometimes you break a blood vessel on the concha which s generally no big deal, unless you have a bleeding disorder.  Anyway this is all up in you sinuses and when you blow you nose hence the warm pink snot.  I hope that this anatomy and physiology lesson was helpful, if not email me. I'll explain further
3439
The sinus inside the nose builds up from the lack of warm oxygen. Thus, when you are in a cold area, you feel the clogging of your nose and eventually you will have snot.\n\nIf your nose is runny,\nAnd you think its funny,\nWell, it's snot.\n\n- ICE, Gaylord Palms FL
28595
Your nose encounteres a smell. The olfactory nerves are stimulated and send an impule to the brain. Your brain intereprets this signal and then responds. In some cases,using motor neurons to move you away from the source of the odor.
947210
You sneeze because you have something in your nose and your body is trying to get it out.  You don't get it out the first time, or your nose is still irritated.
748775
The cause of an itch is because of dead skin cells. Itching promotes sheading those skin cells and prepares for new ones.
683646
Because your nose is not very clean.  Try cleaning your nose out and u might see a difference.
1058092
Your nose and feet are NOT related. Your nose is running because it's allergy season. And your feet smell because you need to take a bath.
686817
I had a similar problem, I'd slap myself in the face when my nose itched.. the docs diagnosed me with OBSESSIVE COMPULSIVE DISORDER which is treatable mind you.... sounds like what you may have... go see a neurologist or even your family doc and tell him bout it