Urticaria, also known as "hives", is the eruption of red marks on the skin that are usually accompanied by itching. This condition can be caused by an [[allergy]] (e.g. to food or drugs), [[stress]], [[infection]] or physical agents (e.g. heat or cold).
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'''Urticaria''', also known as "hives", is the eruption of red marks on the skin that are usually accompanied by itching. This condition can be caused by an [[allergy]] (e.g. to food or drugs), [[stress]], [[infection]] or physical agents (e.g. heat or cold).