Hives, or urticaria, are an allergic skin reaction characterized by swollen, red spots that itch. They can be caused by mosquito bites, a fabric allergy or changes in temperature.
What is it: Stress hives are raised, red bumps on the skin that are triggered by a strong emotional reaction.
What is it: Being allergic to water is a rare condition in which the skin becomes red, patchy and irritated when in contact with water.
Cholinergic urticaria is a condition associated with hives that appear when body temperature increases.
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