Roberto Caricchio, MD, FACR, Interim Chief of the Section of Rheumatology at the Lewis Katz School of Medicine at Temple University (LKSOM); Director of the Temple Lupus Clinic at Temple University Hospital; and Associate Professor of Medicine, Microbiology and Immunology at LKSOM, explained Raynaud’s phenomenon for a PhillyVoice piece on how to exercise safely in the cold weather with the condition.