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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 ]
Acute urticaria (short-term): can develop suddenly and will last less than six weeks. [6] About one in six people will have acute hives at one point in their life. [6] Chronic urticaria (long-term): can develop suddenly and will persist more than six weeks. [6] This type of urticaria is uncommon [6] and occurs in only 0.1% of the population.
Urticaria, commonly known as hives, has been recognized as a medical condition for centuries, with descriptions of the characteristic skin lesions appearing in ancient medical texts. However, the understanding of urticaria as an autoimmune condition is a relatively recent development in medical history. [14]
Hives, or urticaria, are itchy pink welts that could appear anywhere on your skin. Some are bumps as small as a pinhead, while others may merge together to cover large patches of your skin.
Other symptoms to note: Hives are most of often the result of exposure to allergens, and they could be a sign of a serious allergic reaction. Hives might not cause any discoloration on darker skin ...
The rash appears immediately in irritant contact dermatitis; in allergic contact dermatitis, the rash sometimes does not appear until 24–72 hours after exposure to the allergen. Blisters or wheals: Blisters, wheals (welts), and urticaria (hives) often form in a pattern where skin was directly exposed to the allergen or irritant.
The most common symptoms of chronic spontaneous urticaria are angioedema and hives that are accompanied by itchiness. Chronic spontaneous urticaria, despite its cause being unknown, is linked to a higher prevalence of autoimmune diseases , and is often worsened by triggers like stress, infections, certain foods, or nonsteroidal anti ...
These symptoms may occur concurrently, successively, or independently. Typically, when a drug triggers urticaria, symptoms manifest within 24 hours of ingestion, aiding in the identification of the causative agent. Urticaria symptoms usually subside within 1–24 hours, while angioedema may take up to 72 hours to resolve completely. [2]