What Causes a Thrombus?
What Causes a Thrombus?
A thrombus is a blood clot in a blood vessel. A thrombus may form in a vein (venous thrombosis) or artery (arterial thrombosis). If a thrombus breaks free and enters the bloodstream, it is called an embolus. Injury, illness, immobility, obesity and some medications may increase the risk of or...
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Causes of a thrombus in a vein (venous thrombosis) include:
- Injury to the leg veins
- Illness that affects the veins
- Immobility
- Broken bone
- Certain medications
- Obesity
- Inherited (genetic) disorders
- Autoimmune disorders that increase the risk of blood clots
- Medicines that increase the risk of blood clots (such as certain birth control hormones)