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Poison oak rash on ...	Erythema toxicum on...	Erythema multiforme...
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Erythema annulare centrifugum - close-up

When redness appears in ring shapes on the body, it is referred to as erythema annulare, shown here on the forearm. There are generally no symptoms, with the exception of mild itching (pruritus. It may be associated with serious diseases, but in the majority of cases, an underlying illness is never discovered.

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·As a Complication

·As a Symptom

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