URL of this page: //medlineplus.gov/ency/article/003231.htm


A patch is a flat area of color change in the skin that measures 1 centimeter or more in diameter.


Review Date 10/27/2014

Updated by: Laura J. Martin, MD, MPH, ABIM Board Certified in Internal Medicine and Hospice and Palliative Medicine, Atlanta, GA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.