Impetigo is a highly contagious disease caused by streptococcus or staphylococcus bacteria. It causes a superficial skin infection which appears red with yellow or golden crusts. It is seen frequently in children on the face, upper trunk, and arms. Note that the nose is also infected.
Review Date 10/24/2016
Updated by: David L. Swanson, MD, Vice Chair of Medical Dermatology, Associate Professor of Dermatology, Mayo Medical School, Scottsdale, AZ. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.