Raynaud's Disease is a rare disorder that affects the arteries. Arteries are blood vessels that carry blood from your heart to different parts of your body. Raynaud's is sometimes called a disease, syndrome, or phenomenon. The disorder is marked by brief episodes of vasospasm (narrowing of the blood vessels). Vasospasm of the arteries reduces blood flow to the fingers and toes. In people who have Raynaud's, the disorder usually affects the fingers. In about 40 percent of people who have Raynaud's, it affects the toes. Rarely, the disorder affects the nose, ears, nipples, and lips.
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Cold weather triggers a painful and sometimes debilitating disorder for millions of Americans who suffer from Raynaud's disease (also known as Raynaud's syndrome or phenomenon). Raynaud's is an autoimmune disorder in which spasms in the blood vessels can interrupt blood flow to the fingers, toes, nose and ears. Exposure to cold triggers the spasms, typically causing the affected area to turn white, then blue, then bright red. Emotional stress can also cause an attack.
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