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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 .
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 ...
Upon examination, the important clinical observations are the (1) morphology, (2) configuration, and (3) distribution of the lesion(s). [29] With regard to morphology, the initial lesion that characterizes a condition is known as the "primary lesion", and identification of such a lesions is the most important aspect of the cutaneous examination ...
The disorder has various forms or presentations, which its name reflects (multiforme, "multiform", from multi-+ formis). Target lesions are a typical manifestation. Two standard types, one mild to moderate and one severe, are recognized (erythema multiforme minor and erythema multiforme major), as well as several rare and atypical types. [3]
Patients usually develop a burning, pruritic sensation before the infection erupts. A physical exam shows vesicles and vesicopustules, along with pain and erythema. It is important to not confuse this with a felon or a paronychia as incision and drainage of herpetic whitlow could result in a secondary bacterial infection and failure to heal. [16]
Erythroderma is generalized exfoliative dermatitis, which involves 90% or more of the patient's skin. [3] The most common cause of erythroderma is exacerbation of an underlying skin disease, such as Harlequin-type ichthyosis, psoriasis, contact dermatitis, seborrheic dermatitis, lichen planus, pityriasis rubra pilaris or a drug reaction, such as the use of topical steroids. [4]
Patients present with an acute onset of swelling, pain, erythema, prominent tenderness, warmness and limited range of motion in both ankles. [1] [2] Lower legs and heels may also be involved, however the distal parts of feet and toes are usually spared. Patients may also experience high-graded fever, pitting edema and hypotension.
Erythematotelangiectatic rosacea exhibits permanent redness (erythema) with a tendency to flush and blush easily. [13] Also small, widened blood vessels visible near the surface of the skin (telangiectasias) and possibly intense burning, stinging, and itching are common. [13] People with this type often have sensitive skin.