Why does your skin itch sometimes?
610830
the reason our skin itch sometimes is due to the effect of our own body immune system against antigen (foreign body not recognize by our immune system). \nWhen antigen enters our body through skin, it is detected by Langerhans cells beneath our skin and triggers our immune system to release histamine to eradicate the antigen, and the histamine secretion is the reason why our skin feel itch sometime.
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.
1129499
When you scratch your itch, you are temporarily paralyzing the sensors in your skin.
1146650
I don't know what it is, but anything that you may be allergic to can cause skin hives.
525163
On a Psychic basis, it can mean either you are going to be handing out a lot of cash, or receiving a lot of cash. More seriously though, if your entire hand is itchy, you could have handled something that you're allergic to. If it's only very localised, then maybe it's just a mosquito or Flea bite.
1001408
It's the release of histamine during the immune response that causes you to itch.
1141127
Someone who itches all over should seek medical care. Because itching can be caused by such a wide variety of triggers, a complete physical exam and medical history will help diagnose the underlying problem. A variety of blood and stool tests may help determine the underlying cause.
318778
Itching is low grade pain. Sometimes a change of temperature balances the nerve endings just enough to change the natural signal for awhile.
660357
You may have come in contact with something you may be allergic to. It could also be eczema or psoriasis.  It's best to let a professional diagnose you then us.
1044804
You could have a skin condition called "eczema".That would explain the itching and dryness.That might explain the problem with the sweat too.The scaly skin could be so thick that it's covering your pores/effecting your sweat glands somehow.
604016
an itch is caused by an inflammation or irritation of the skin...\nwhich is generally due to some skin disease etc..
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.
427317
The dirt and grime under your nails comes from about anything you come into contact with. Mostly, however, it is dead skin. Even when you believe that you have not touch anything it is not uncommon to scratch an itch with out even knowing you did.
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.
595667
We itch because the infection/healing around the sore is inflamed and aggravated. But the reason you are told by your mother not to itch, is the chance of infection from dirty fingers touching a wound
367187
I have heard several different explanations. Some are more scientific than others. It used to be that some doctors thought itching was actually a slight form of pain, but this is not believed to be the case by most folks today. \nSome believe that irritants landing on the skin cause itching, but itching can also be caused by skin stretching too quickly (which often happens during pregnancy) or is too dry. \nSome people think to remedy skin itching taking zinc or using lotions will ease the symptoms. Others suggest running cold water on itches or hot water on itches. I have also heard of people alternating super hot water to kill the initial itch, and follow it quickly with colder water. Doctors tend to discourage use of hot water, as it dries the skin further and since lack of moisture is one reason to have itching, keeps a vicious cycle going.\nBut all of this does not generally answer what an itch is. Most medical definitions are not helpful in that respect, and it was years before I got any sort of real illumination on this issue. It wasn’t till I took zoology and genetics that one of my professors finally made it clearer.\n I was lead to believe by my professor that it was really mostly a case of a sodium build up around the mylination around your nerves that is overloading your nerve endings in that area. Scratching provides a way to break up the sodium deposit and realign the elemental/mineral concentration to a more normal level. So an itch is a build up or change in the flow of chemicals that surround the nerve sheaths, causing the nerves to react in the skin. \n\nThat said, scratching while nice initially often damages the skin and can lead to cyclical scratch/itch/scratch issues, that further irritate the skin and cause greater damage.
1118828
Probably when a woman's private itches inside or out. The drug or lotion or what have you irritated it.