Raynaud's phenomenon is a condition where the blood vessels in the fingers and toes, and sometimes other area, temporarily narrow, leading to reduced blood flow. This typically occurs in response to cold temperatures or stress, causing the affected areas to turn white or blue and feel numb or cold. Once the trigger is removed, blood flow returns, and the affected areas may turn red and throb or tingle as circulation improves. Raynaud's phenomenon can be occurring on its own or associated with another underlying condition. Treatment focuses on managing symptoms and avoiding triggers, such as keeping warm in cold weather and managing stress. In severe cases, medications or other actions may be necessary to improve blood flow.

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