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  2. What are hives? A dermatologist explains

    www.aol.com/news/hives-dermatologist-explains...

    “For most people who have hives, the episode will end, and their skin will be better within a few days. If that’s not the case, you should see your dermatologist,” she said. Hives are common ...

  3. Hives - Wikipedia

    en.wikipedia.org/wiki/Hives

    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]

  4. Drug-induced urticaria - Wikipedia

    en.wikipedia.org/wiki/Drug-induced_urticaria

    One of the most prevalent forms of adverse drug reactions is cutaneous reactions, [1] with drug-induced urticaria ranking as the second most common type, preceded by drug-induced exanthems. [2] Urticaria, commonly known as hives , manifests as weals, itching, burning, redness, swelling, and angioedema —a rapid swelling of lower skin layers ...

  5. Jarisch–Herxheimer reaction - Wikipedia

    en.wikipedia.org/wiki/Jarisch–Herxheimer_reaction

    A Jarisch–Herxheimer reaction is a sudden and typically transient reaction that may occur within 24 hours of being administered antibiotics for an infection by a spirochete, including syphilis, leptospirosis, Lyme disease, and relapsing fever. [1]

  6. Skin allergy test - Wikipedia

    en.wikipedia.org/wiki/Skin_allergy_test

    Even though skin testing may seem to be a benign procedure, it does have some risks, including swollen red bumps (hives) which may occur after the test. The hives usually disappear in a few hours after the test. In rare cases they can persist for a day or two. These hives may be itchy and are best treated by applying an over the counter ...

  7. Urushiol-induced contact dermatitis - Wikipedia

    en.wikipedia.org/wiki/Urushiol-induced_contact...

    The rash takes one to two weeks to run its course and may cause scars, depending on the severity of the exposure. [4] Severe cases involve small (1–2 mm), clear, fluid-filled blisters on the skin. Pus-filled vesicles containing a whitish fluid may indicate an infection. Most poison ivy rashes, without infections, will resolve within 14 days ...

  8. Cold urticaria - Wikipedia

    en.wikipedia.org/wiki/Cold_urticaria

    Cold urticaria (essentially meaning cold hives) is a disorder in which large red welts called hives (urticaria) form on the skin after exposure to a cold stimulus. [1] The hives are usually itchy and often the hands, feet and other parts of the body will become itchy and swollen as well.

  9. Cellulitis - Wikipedia

    en.wikipedia.org/wiki/Cellulitis

    Around 95% of people are better after 7 to 10 days of treatment. [2] Those with diabetes, however, often have worse outcomes. [10] Cellulitis occurred in about 21.2 million people in 2015. [7] In the United States about 2 of every 1,000 people per year have a case affecting the lower leg. [1] Cellulitis in 2015 resulted in about 16,900 deaths ...