Raynaud's Phenomenon is an auto-immune disorder which causes poor circulation in the digits and may affect up to 10% of all women. It is characterized by episodic blanching or cyanosis of one or more digits on exposure to cold; the phenomenon may occur with or without an underlying disease. This monograph presents the most up-to-date knowledge concerning Raynaud's Phenomenon, both as a primary disease and as the secondary result of an underlying disease, drug therapy or occupational exposure. The book reviews anatomy, physiology, the clinical picture, prevalance of the disease, diagnosis, prognosis, physiology and pathophysiology, and treatment.