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Urushiol-induced contact dermatitis (also called Toxicodendron dermatitis or Rhus dermatitis) is a type of allergic contact dermatitis caused by the oil urushiol found in various plants, most notably sumac family species of the genus Toxicodendron: poison ivy, poison oak, poison sumac, and the Chinese lacquer tree. [1]
Hives, or urticaria, is a form of skin rash with red, raised, itchy bumps. [1] They may also burn or sting. [2] Hives can appear anywhere on the surface of the skin. Whether the trigger is allergic or not, a complex release of inflammatory mediators, including histamine from cutaneous mast cells, results in fluid leakage from superficial blood ...
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.
Allergic rashes, like a drug rash, occur when you ingest an allergen, including certain foods, such as peanut allergies, or medications. And viral infections, like coronavirus, can also result in ...
This plant may look like wildflowers, but it can cause painful rash and blistering. A video of an Iowa resident with the rash explains why. ... Call 911 or go to a hospital emergency room if you ...
Tiny amounts of suspected allergens and/or their extracts (e.g., pollen, grass, mite proteins, peanut extract) are introduced to sites on the skin marked with pen or dye (the ink/dye should be carefully selected, lest it cause an allergic response itself). A negative and positive control are also included for comparison (eg, negative is saline ...
After that, the grass allergy season begins. Spring allergies are exacerbated by rain patterns seen in Mississippi. Often, in the spring months, there is a pattern of a few days of heavy rainfall ...
An estimated 90% of people with hay fever are allergic to grass pollen. Weeds: ragweed (Ambrosia), plantain , nettle/parietaria , mugwort (Artemisia Vulgaris), Fat hen (Chenopodium), and sorrel/dock ; Allergic rhinitis may also be caused by allergy to Balsam of Peru, which is in various fragrances and other products.
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