buzzmenot
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When I lived in a temperate climate for awhile, I hung out with this norwood 6 friend of mine for a whole lot. I kept scratching my legs and noticed that it had red rings around my leg hair folicle openings. My bald friend had this as well. Normal haired pple with us did not experience itchyness. Hairs soon fell out of these openings, they eventually regrew on returning to a warm climate but came back as squiggly hair.
Has this occured to you?
This is just a skin sensitivity poll, especially to cold ambient temperatures. If you live in a warm climate just scratch your skin and wait 1 minute for swelling and redness on the scratch to know if you're susceptible.
http://www.answers.com/main/ntquery?s=histamine+&gwp=13
little info in histamine:
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A biologically active amine that is formed by the decarboxylation of the amino acid histidine. It is widely distributed in nature and is found in plant and animal tissues as well as in insect venoms. In humans, histamine is a mediator of inflammatory reactions, and it functions as a stimulant of hydrochloric acid secretion in the stomach.
Most tissue histamine is found stored in mast cells, where it can be released by a variety of stimuli. Once released, it can cause many effects, including constriction of bronchiolar, gastrointestinal, uterine smooth muscle, and lowering of blood pressure. If histamine is released in the skin, itching, a flare (area of redness) due to vasodilation, and a wheal due to leaking of fluid into the tissue are observed. The increase in vascular permeability that permits this leakage is due to an action on the endothelial cells of postcapillary venules.
Has this occured to you?
This is just a skin sensitivity poll, especially to cold ambient temperatures. If you live in a warm climate just scratch your skin and wait 1 minute for swelling and redness on the scratch to know if you're susceptible.
http://www.answers.com/main/ntquery?s=histamine+&gwp=13
little info in histamine:
==============
A biologically active amine that is formed by the decarboxylation of the amino acid histidine. It is widely distributed in nature and is found in plant and animal tissues as well as in insect venoms. In humans, histamine is a mediator of inflammatory reactions, and it functions as a stimulant of hydrochloric acid secretion in the stomach.
Most tissue histamine is found stored in mast cells, where it can be released by a variety of stimuli. Once released, it can cause many effects, including constriction of bronchiolar, gastrointestinal, uterine smooth muscle, and lowering of blood pressure. If histamine is released in the skin, itching, a flare (area of redness) due to vasodilation, and a wheal due to leaking of fluid into the tissue are observed. The increase in vascular permeability that permits this leakage is due to an action on the endothelial cells of postcapillary venules.