Hive/urticaria?: Since i don't have much from your description, i suspect you may have urticaria, commonly known as hive. This often comes randomly and resolve within hours..There are several type.Physical urticaria (pressure, cholinergic, dermatographism), urticaria due medical illness, and idiopathic (unknown cause)..It is often frustrating but not dangerous. If bothersome, consult doc. Good luck.
Answered 2/22/2013
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