Erythema Chronicum Migrans is a raised erythematous ring with advancing indurated borders and central clearing, radiating from the site of a tick bite and persisting for 2–16 weeks; the characteristic skin lesion of Lyme disease, due to the spirochete Borrelia burgdorferi. Below you may find medications used to treat or help with Lyme Disease, Erythema Chronicum Migrans. More about Lyme Disease, Erythema Chronicum Migrans