Deep vein thrombosis (deep vein clots) and pulmonary embolism (blood clots in the lungs) are serious, yet often related, critical conditions. DVT occurs when a clot forms in a deep vein, most commonly in the thigh. https://aishahsla977382.tinyblogging.com/understanding-deep-vein-thrombosis-and-pulmonary-embolism-83032617