If our skin is itching, we  scratch - and rub in dirt and bacteria. Why did nature invent itching at all?
471082
Well, three quesses.\n According to your hypothesis we rub in dirt and bacteria, so maybe nature is doing this on purpose to make us get bateria on us to build up our immune systems. \n Or maybe there are chemicals or enzymes in things that bite us or touch our skin (like being allergic to metal) that cause the itch. \n But I think the most popular answer to this queston would have something to do with the fact that during a months time your skin is completeky recycled meaning, the layer that was on the very bottom at the begining of that month is now the top layer of skin. You itch because dead skin is needing to be scracted off.
768994
when a bug bites you it injects a bit of its saliva and sometimes poison into your skin which causes itchyness so when you scratch any itch it feels better but try not to, it will keep the wound from healing because itching also means its healing and if you keep any wound open it is vulnerable to bacterias and infection.
1049551
It's not a ploy....not sure why you'd think it was.\n\nI can't say why we get itchy, but it does happen.  Because most women aren't comfortable with scratching their business in public, it's necessary to use a cream.  Plus if you keep scratching it, you're eventually going to create an open sore, and that would just plain suck.
512467
Because our genetalia, being on the outside of our bodies, shifts and moves about as we go through our day.  Occasionally it will become positioned in such a way that is uncomfortable or painful and must be repositioned.  A gentleman will make the necessary adjustments privately.  As for scratching, bacteria grow in the the sweat of our groins which can cause our skin to itch.  Again, a gentleman will scratch in private.  You will probably notice that most public grabbers and scratchers are younger and have not come to accept that thier behavior is not appealing to others, especially women.
851076
Yes, and it makes your nether regions itch. But scratching down there is a sin. Just one of the many paradoxes of religion...
12186
They itch because your body is reacting to a chemical the mosquitoes inject into your skin to keep you from feeling them suck your blood. As for stopping the itching, I've always had good luck with After Bite - http://www.tendercorp.com/afterbite.html
1007046
hmm....so that's why they itch.  I knew there was a logical answer.  Hmm....so why do my balls itch then?  Elves, also?
282402
Pruritis is the medical word for itch.\nThe exact cause of an itch is unknown and is a complex process. It involves nerves in the skin responding to certain chemicals such as histamine, and then processing these signals in the brain. Pruritis can be a symptom of certain skin diseases, and sometimes a manifestation of an internal process. In other patients where there is no evidence of skin or internal disease, pruritis may be due to faulty processing of the itch sensation within the nervous system.
308664
Our body produces an acid to compensate for dust and other irritants..the stain is actually what got trapped..microbiological entities, dirt sweat particals from the underwear.  you get the idea.
786763
is the answer water? um, you nedd water to make cement to build castles, it can tear down mountains by erosion, um..i dont know about the blinds some men bit, and sometimes if u just put ome water in you eyes, it stop your eyes getting itchy...\nor it could be people but i dont think thats a substance..
22645
The reason for the sensation of itching is not well understood. While itching is the most noticeable symptom in many skin diseases, but it doesn't necessary mean that a person who feels itchy has a disease.\n\nStress and emotional upset can make itching worse, no matter what the underlying cause. If emotional problems are the primary reason for the itch, the condition is known as psychogenic itching. Some people become convinced that their itch is caused by a parasite; this conviction is often linked to burning sensations in the tongue, and may be caused by a major psychiatric disorder.
311894
an itch is when something causes histamines in your skin cells to be released. then your sensory cells become depolarized and signal to your spinothalamic tract. itches are controlled by your spinal cord if i recall from anatomy class, because it is not really needed to be noticed by your cortex. if you noticed every single itch in your cortex you would most definetly go insane. \nanti-histamines are usually in allergy medication to relieve itchiness.\nim pretty sure you might scratch hard enough to remove cells, but i dont think scratching is used for removing dead cells.\nthis might be a a bit vague or not quite correct but its the best i could remember.
888859
look at this ewbsite, they explain how each constituent works, improving blood supply may be the reason but there is no scientific data suggestiong itching from improved blood supply to the skin, if itching persists or worsens, see a doctor, good luck
539379
Scratching causes another counter irritation and the brain gets distracted. Chk out the  link\n\nhttp://www.ratlab.co.uk/itch.htm
241287
It could be an underlying health problem ,ie.kidneys or liver problems you should get checked out,have you tried any creams and you dont say were the itching is.
1127576
You should poo in your pants whenever it itches.  The poo will help!
997123
There are many things that can cause itching.  If you live in the south and ramble in the woods or in tall grass, it could be chiggers....a minute little bug that gets on you and bites.  Or one of the poisons...ivy,ect.\n\nIf you have been to a hotel you could have gotten bed bugs.\n\nI would suggest that you and your father see a dermatologist.  This is a skin doctor and help is there!  If the itching is severe, creams with benedryl in them help and so do the benedryl pills.  Just until you can get to a dermatologist!