Raynaud's Phenomenon

Vasospastic Disorder

A condition causing episodes of reduced blood flow to the fingers and toes in response to cold or stress, turning them white then blue then red.

Raynaud's phenomenon involves episodic vasospasm of digital arteries triggered by cold or emotional stress. Primary Raynaud's is idiopathic and benign; secondary Raynaud's is associated with connective tissue diseases (scleroderma, lupus, rheumatoid arthritis). Calcium channel blockers (nifedipine) are the most effective pharmacological treatment for moderate-to-severe cases.