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Photodermatitis, sometimes referred to as sun poisoning or photoallergy, is a form of allergic contact dermatitis in which the allergen must be activated by light to sensitize the allergic response, and to cause a rash or other systemic effects on subsequent exposure. The second and subsequent exposures produce photoallergic skin conditions ...
Characteristics. Urushiol in its pure form is a pale-yellow liquid with a density of about 0.968 g/mL and a boiling point of 200 °C (392 °F). It is soluble in diethyl ether, acetone, ethanol, carbon tetrachloride, and benzene. [12] [13] Urushiol is a mixture of several closely related organic compounds. Each consists of a catechol substituted ...
rashes, itching, inflammation, oozing, and, in severe cases, a burning sensation. 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 ...
Stress can lead to a rash, such as hives, and it can exacerbate other rash-like skin conditions, Hu says. The link between stress and skin goes back to the hypothalamic-pituitary-adrenal axis in ...
Dermatology. Contact dermatitis is a type of acute or chronic inflammation of the skin caused by exposure to chemical or physical agents. [ 1] Symptoms of contact dermatitis can include itchy or dry skin, a red rash, bumps, blisters, or swelling. These rashes are not contagious or life-threatening, but can be very uncomfortable.
Rarely, allergic reactions may occur, leading to swelling, rash, or difficulty breathing. To minimize risk, follow product instructions carefully. Stop using the cream and consult a healthcare ...
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 and feet will become itchy and swollen as well. Hives vary in size from about 7 mm in diameter to as big as about 27 mm or larger.
Polymorphous light eruption ( PLE) presents with itchy red small bumps on sun-exposed skin, particularly face, neck, forearms and legs. [1] It generally appears 30 minutes to a few hours after sun exposure and may last between one and 14 days. [3] The bumps may become small blisters or plaques and may appear bloody, [3] often healing with ...