Nipple vasospasm-Raynaud syndrome

Raynaud syndrome, also known as Raynaud's phenomenon, eponymously named after the physician, Auguste Gabriel Maurice Raynaud, who first described it in his doctoral thesis in 1862, is a medical condition in which spasm of small arteries cause episodes of reduced blood flow to end arterioles. Typically, the fingers, and less commonly the toes, are involved. [Source: Wikipedia ]