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Hives, also known as urticaria, is a kind of skin rash with red and/or flesh-colored, raised, itchy bumps. [1] Hives may burn or sting. [2] The patches of rash may appear on different body parts, [2] with variable duration from minutes to days, and do not leave any long-lasting skin change. [2]
Dermatographic urticaria is sometimes called "skin writing", as it is possible to mark deliberate patterns onto the skin. The condition manifests as an allergic-like reaction, causing a warm red wheal to appear on the skin. As it is often the result of scratches, involving contact with other materials, it can be confused with an allergic ...
Urticaria are characterized by dermal edema (wheal, swollen) and erythema (flare, red), [2] also known as hives. [5] Hive lesions typically last less than 24 hours and are usually itchy (pruritic). [2] Hives can appear anywhere on the body and they may change shape, move around, disappear and reappear over short periods of time. [5]
Chronic spontaneous urticaria is defined by the presence of wheals, angioedema, or both for more than six weeks. [32] In various areas of the world, the standard workup is different. A very comprehensive history is something that is universally agreed upon. [33]
What it looks like: Psoriasis, another inflammatory condition that dermatologists see frequently, is known to causes scaly, itchy areas of thickened skin called plaques that can look like rashes.
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In severe cases, drinking water can result in swelling of the oral cavity, [3] swelling of the throat, [4] and in extreme cases, anaphylaxis. [5] [6] [7] The hives associated with aquagenic urticaria are typically small (approximately 1–3 mm), red- or skin-colored welts (called wheals) with clearly defined edges.
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