What is deep vein thrombosis?

Deep vein thrombosis (DVT) refers specifically to the formation of a blood clot in a deep vein, typically in the legs. This condition occurs when blood flow in the veins slows down, leading to clot formation. The clot can partially or completely block blood flow in the vein, which can cause swelling, pain, and, in more severe cases, can lead to serious complications, such as a pulmonary embolism if the clot travels to the lungs.

Understanding DVT is crucial because it can occur due to various risk factors, including prolonged immobility, certain medical conditions, or even surgery. Recognizing DVT is important for timely treatment to prevent complications. The other options do not accurately define DVT, as they focus on different health conditions unrelated to the specific issue of blood clots forming in veins.