SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
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Raynaud's disease symptoms in the hands of a male patient. Raynaud's disease is a vasospastic condition, in which the hands or feet develop an abnormal nervous response to cold. A spasm or contraction occurs in the muscle which surrounds the blood vessels in the fingers or toes. This constriction restricts the blood flow and the fingertips become bluish in colour, numb and sore.
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