Deep vein thrombosis (DVT) is a blood clot that forms inside a vein deep in the body, whereas superficial thrombophlebitis (STP) is inflammation of the veins just below the skin’s surface. STP can ...

Medically reviewed by Lauren Schlanger, MD Key Takeaways A blood clot in your arm is often associated with a health condition like cancer or the use of an inserted device like a catheter or pacemaker, ...