Raynaud’s isn’t serious but that doesn’t mean it shouldn’t be taken seriously. If you have Raynaud’s, it might be a sign – often the first sign – that a serious autoimmune disease like scleroderma or lupus is the culprit. “Raynaud’s is far more common than people think,” says Lynn Wunderman, founder and chair of the Raynaud’s Association ( http://www.raynauds.org).