erythema infectiosum


Erythema is redness of the skin caused by capillary congestion.


It can be caused by infection, massage, electrical treatments, acne medication, allergies, exercise, solar radiation (sunburn), or waxing and plucking of the hairs -- any of which can cause the capillaries to dilate, resulting in redness. Erythema is a common side effect of radiotherapy treatment due to patient exposure to ionizing radiation.

In about 30-50% of cases, the cause of Erythema is unknown.

Associated conditions

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