Erythema chronicum migrans is a characteristic clinical feature of Lyme disease (Lyme borreliosis). It is a distinctive rash, which occurs in the majority of people infected with Borrelia burgdorferi. This infection is transmitted to humans by the bite of a tick from the genus Ixodes.
This is a companion discussion topic for the original article at https://patient.info/doctor/erythema-chronicum-migrans