HEAT HIVES

	Asked by Unregistered (Male; 15 ) on Fri 06, Mar 2009 04:43pm :
	WHAT ARE SYMPTOMS FOR HEAT HIVES?
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	Answer by Dr Rowena S, MD (doctor) on Fri 06, Mar 2009 07:43pm: Hives may present with itching and swelling of the surface of the skin into wheals with clearly defined edges. These may enlarge and and form larger areas of flat, raised skin that turns white (blanches) when you press the center. Hives may be attributed to a lot of causes, but the same mechanism exists. In response to a certain trigger, histamine and other chemicals are released into the bloodstream, causing the symptoms mentioned. Hives are generally harmless and eventually disappear on its own.
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