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Erythema ab igne (Latin for 'redness from fire') EAI, also known as hot water bottle rash, [2] is a skin condition caused by long-term exposure to heat (infrared radiation). [3] Prolonged thermal radiation exposure to the skin can lead to the development of reticulated erythema , hyperpigmentation , scaling, and telangiectasias in the affected ...
Radiation dermatitis, in the form of intense erythema and vesiculation of the skin, may be observed in radiation ports. [3]: 131 As many as 95% of patients treated with radiation therapy for cancer will experience a skin reaction. Some reactions are immediate, while others may be later (e.g., months after treatment). [6]
Signs and symptoms can take as long as 14 days after exposure to appear. [2] They may include signs and symptoms commonly associated with hypersensitivity or infections. Common symptoms include: rashes and redness. [3] itching and urticaria. [2] joint pain , especially in finger and toe joints. [2] [3] fever, usually appears before rash.
The principal site of damage is the germinal layer, and often the initial response is erythema (reddening) due to blood vessels congestion and edema. Erythema lasting more than 10 days occurs in 50% of people exposed to 5-6 Gray. [10] Other effects with exposure include: [10] 2–3 Gray—temporary hair loss; 7 Gray—permanent epilation occurs
Erythema migrans / Lyme disease: Expands over days or weeks to 5–70 cm (median 16 cm), circular or oval, red or bluish, may have an elevated or darker center, may have a central or ring-like clearing, may feel warm, not painful or itchy [4] [5] Armpit, groin, back of knee, on the trunk, under clothing straps, or in children's hair, ear, or ...
This illness is a tick-borne disease carried by the lone star tick Amblyomma americanum.This tick was first proposed as a possible vector of disease in 1984, [2] and the illnesses associated with the tick called "Lyme-like disease", [3] but it was not recognized to be distinct from Lyme disease until the late 1990s.
The most distinctive features of the EM rash are the speed and extent to which it expands, respectively 2–3 cm per day and up to a diameter of 5–70 cm (50% attain more than 16 cm). [ 3 ] [ 10 ] [ 4 ] The rash is usually circular or oval, red or bluish, and may have an elevated or darker center.
Erythema (Ancient Greek: ἐρύθημα, from Greek erythros 'red') is redness of the skin or mucous membranes, caused by hyperemia (increased blood flow) in superficial capillaries. [1] It occurs with any skin injury, infection, or inflammation .