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	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Blood clots can form in arteries or veins. When inflammation due to a blood clot occurs in a vein, it is called thrombophlebitis. Thrombophlebitis usually occurs in the veins of the legs. Rarely, it can occur in the veins of the arms or neck. Superficial (on the surface) thrombophlebitis occurs in the visible veins just under the skin. The area of inflammation is usually reddened, tender, and warm to the touch and can be painful. The extremity may swell and fever may occur. Deep venous thrombosis (DVT) is more dangerous than superficial thrombophlebitis. Deep venous thrombosis often cannot be seen or felt by the individual. Swelling of the extremity or fever may alert a person to the presence of a DVT, especially if risk factors for DVT exist. Pulmonary embolism, a condition that can be fatal, results from a DVT that becomes loose in the venous . . . [Full Text of this Article]

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Janet M. Torpy, MD, Writer; Alison E. Burke, MA, Illustrator; Richard M. Glass, MD, Editor

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