Merck Manual

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The Rash of Lyme Disease (Erythema Migrans)
The Rash of Lyme Disease
The Rash of Lyme Disease (Erythema Migrans)

Typically in Lyme disease, a red spot (erythema migrans) appears at the site of the tick bite. The spot slowly expands and often clears in the center.

Image courtesy of Thomas Habif, MD.

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Lyme Disease