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Wheals and urticaria are related but refer to different aspects of the condition. Wheals are the individual raised, itchy bumps that appear on the skin in response to a trigger, like an allergy, insect bite, or other irritant. They are the physical marks you see on the skin. Urticaria, on the other hand, is the condition or reaction that causes the outbreak of these wheals, along with redness, itching, and sometimes swelling. Hives is a common term used interchangeably with urticaria.
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