Raynaud syndrome, also known as Raynaud's phenomenon, is a medical condition in which the spasm of small arteries causes episodes of reduced blood flow to end arteriole. … The episodes classically result in the affected part turning white and then blue. Often, numbness or pain occurs. … As blood flow returns, the area turns red and burns. The episodes typically last minutes but can last several hour. #raynaud #warm #cold #bloodflow #brownsanatomy
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