Superficial thrombophlebitis is a thrombosis and inflammation of superficial veins which presents as a painful induration with erythema, often in a linear or branching configuration forming cords.Superficial thrombophlebitis is due to inflammation and/or thrombosis, and less commonly infection of the vein. It is generally a benign, self-limited disorder, however, it can be complicated by deep vein thrombosis (DVT) and even pulmonary embolism (PE) Migratory superficial thrombophlebitis is known as Trousseau's syndrome. [Source: Wikipedia 
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