Raynaud's phenomenon is characterized by fingers becoming white due to lack of blood flow, then blue due to oxygen consumption, and finally red as blood flow returns.
Review Date 10/1/2017
Updated by: Gordon A. Starkebaum, MD, Professor of Medicine, Division of Rheumatology, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.