Raynaud's phenomenon is an arthritis-related condition which occurs when blood vessels constrict. The fingers and toes are most commonly affected by Raynaud's. It's possible for the nose, lips, and ear lobes to also be affected. The decreased blood flow can cause pain and discomfort in the affected area as well as discoloration of the skin. For most people, an attack is usually triggered by exposure to cold or emotional stress.

Raynaud's can occur as a primary or secondary condition. As a primary condition, it is not associated with any other disease and is often referred to as Raynaud's disease. Rheumatic conditions associated with secondary Raynaud's include:

• Scleroderma
• Lupus
• Rheumatoid Arthritis
• Sjogren's Syndrome
• Dermatomyositis
• Polymyositis
• Mixed Connective Tissue Disease

The National Institute of Arthritis and Musculoskeletal and Skin Conditions estimates that 5 to 10 percent of the U.S. population is affected by Raynaud's phenomenon. Learn more about Raynaud's disease causes, diagnosis, symptoms, and treatment in the Fast Facts About Raynaud's Phenomenon.

• Guide to Raynaud's Phenomenon
• Understanding Raynaud's Phenomenon
• Raynaud's Phenomenon Screening Quiz

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