A blood clot may occur from trauma, inflammation, or abnormal clotting factors and is simply a mixture of blood components that have formed from a liquid to a solid state. -- http://www.clotconnect.org/
Superficial thrombophlebitis (SVT)
Inflammation of a vein due to a blood clot in a vein usually located in veins near the skin surface. -- Also called: superficial vein thrombosis
Thrombosis is the formation of a blood clot inside a blood vessel that obstructs the flow of blood through the circulatory system.