What is deep vein thrombosis?

What is deep vein thrombosis?

Deep vein thrombosis (DVT, also called venous thrombosis) occurs when a thrombus (blood clot) develops in veins deep in your body because your veins are injured or the blood flowing through them is too sluggish. The blood clots may partially or completely block blood flow through your vein. Most DVTs happen in your lower leg, thigh or pelvis, but they also can occur in other parts of your body including your arm, brain, intestines, liver or kidney.