Fingers that change color when they are exposed to cold temperatures or stress are a sign of cyanosis. Cyanosis is a bluish discoloration of the skin and mucous membranes from lack of oxygen.

Raynaud's phenomenon may cause sudden change in the finger color.

• Arterial insufficiency or spasms of arteries that supply blood to the fingers and toes
• Buerger's disease
• Necrotizing vasculitis
• Scleroderma
• Systemic lupus erythematosus

Avoid smoking.

Avoid exposure to cold in any form. Wear mittens or gloves outdoors and when handling ice or frozen food. Avoid chilling, which may happen following any active recreational sport. Wear comfortable, roomy shoes and wool socks. When outside, always wear shoes.