Raynaud's Phenomenon: What is raynaud's phenomenon? Raynaud's (say "ray-nohz") phenomenon is a problem with blood flow. Your body doesn't send enough blood to your hands and feet, so they feel very cold and numb. In most cases, this lasts for a short time when your body overreacts to cold temperatures. Some people require calcium channel blocker such as amlodipine, if other joint problems then a rheumatologist.
Answered 1/14/2014
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