Erythema multiforme on the hands. These lesions are circular and may appear in concentric rings (often called target lesions). They may be associated with other medical conditions such as infections or medications. Cold sores (herpes simplex on the lips) is often associated with this condition.
Review Date 10/14/2018
Updated by: Michael Lehrer, MD, Clinical Associate Professor, Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.