35 reactions |  The Erythema Migrans (EM) rash is one of the most...

Lyme Disease Diagnosing, Testing & Treatment | NAPNAP Knows Lyme

Eritema migrans: identificación, tratamiento y más - Profesional de la salud 2026

We often hear the terms “erythema migrans” and “bull’s-eye rash” 🎯 used interchangeably. But they are not necessarily the same thing. An erythema migrans, or EM, rash sometimes occurs when a person has been infected with Lyme disease. But not always. And an EM rash is sometimes shaped like a bull’s-eye target—a red ring within another red ring, with a clear spot in the middle. But not always. Unfortunately, misconceptions about these rashes can lead to people being told they don’t have Lyme dis

What Is Erythema? - Definition, Symptoms & Causes

Lyme Disease Symptoms : Johns Hopkins Lyme Disease Research Center