See below: It is a constriction of the blood vessels on exposure to cold.
Answered 12/16/2012
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Raynauds Phenomenon: Secondary Raynaud’s is also known as Raynaud's Phenomenon which is caused by an underlying disease, condition, or other factor. Many things can cause secondary Raynaud's such as diseases and conditions that directly damage the arteries or damage the nerves that control the arteries in the hands and feet or Repetitive actions that damage the nerves that control the arteries in the hands and feet.
Answered 7/29/2015
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