What is an "itch" or what causes "itching?"?
341987
an itch is somewhere in your body that you want to scratch really very much. Itching can be caused due to allergy to certain types of foods, medicine, moquitoes, sunlight or warm weather in general.
712026
When you exercise, your heart pumps faster and your blood vessels dilate as a mechanism for heat loss due to your energy expenditure.  With exercising, you are detoxifying your body of unwanted wastes and toxins through sweating.  One reason you may be itching is because of the release of  these unwanted wastes through the skin.  This should resolve after exercising and having taken a shower. Another more probable reason is that your blood cells release their histamines, and these mediate the itchy sensation you feel.  This should also resolve after exercising. Not everybody has the same reaction to increase physical activity.  Good luck!
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.
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.
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?
635744
Sounds like the start of a yeast infection.  Contact a doctor if this is your first for medication to treat the cause and the itch.
737909
if it itches a lot it is more than likely a yeast infection.  But, if you are sexually active it could also be an STD.  if you are unsure,  it wouldn't hurt to go to the doctor to get checked
960639
I'm sorry, do you have an itch but can't reach it?
1047584
There are hundreds of different kinds of rashes, and even more causes. We need a lot more information to give any intelligent answers. Does the rash itch? Is it red? Does it change shapes, one part resolving why new ones develop? If so, then you likely have hives, which are usually due to allergy. Hives are caused by the release of histamine by your immune system (mast cells and basophils), and histamine not only causes hives, but can cause gastrointestinal problems (nausea, vomiting, diarrhea, intestinal cramping, etc) and headache ("cluster" headache). \n\nYou can look at pictures of all kinds of dermatological problems at this website:  http://dermis.multimedica.de/dermisroot/en/list/all/search.htm Maybe you'll find something which looks like your rash.
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.
1033864
Skin irritation and itching can come from a variety of problems. Allergies to foods are common but are usually easy to diagnose after it occurs after eating the same food or same ingredient in a food. The only bad thing is the reaction usually gets worse ease time you are exposed.  Contact allergies can come from detergents, perfumes or anything else that contacts your skin. PSoriasis is a skin condition that causes itching and severe dryness and flaking of the skin but not welts. Last but not least, I  have seen people break out in hives and itching dwhen they get really nervous.  The most important thing to know is when to seek treatment.  Benadryl may provide the answer, but if the you have a true anaphylactic (allergic) reaction involing your airway you could be minutes from death if not treated appropriately.
1011917
The itchiness is not caused directly by the mosquito's bite or the chemicals in the mosquito spit but by the body's immune response to them. Your immune system releases histamine, a protein involved in many allergic reactions, in order to fight off a foreign substance. The histamine causes swelling around the puncture wound as blood rushes to the affected area, and as a side effect makes you itch. \n\nWho knew?\nI prefer to squish them before they get a chance to bite me!
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.
989561
The underlying skin is grafting back together. As it does, it pulls together, much like a stitch pulls two pieces of skin together. This pulling causes the itching sensation you feel.
650112
Simply stated--Scratching relives the feeling of itchiness because as we scratch we activated some receptors in the skin called Anandamides (which act in the process of relieving pain and other related pleasurable sensations)
968262
its most likely an allergic reaction , the cough and the itch
909346
An itch caused by an insect bite or an allergy whatever, is actually an inflammatory response of the body to an "allergen". The site of reaction swells up because certain cells in the blood of the person getting the bite, comes over to that site and secretes a few fluids and granules of allergic response called "histamines" and "kinins". They cause local swelling and irritation of the nerves near by, which is the cause for the itch. If you apply a "hypertonic" solution( which means a high concentration solution like that made of salt water) to the site of inflammation, the water from the swelling (oedema) gets absorbed into the concentrated solution and the swelling reduces in size. The itch may also disappear. But saliva being a comparatively dilute solution, is incapable of this osmotic action of salt water. So salt water may take away the itch, but saliva usually doesnt.