What causes deep vein thrombosis?

What causes deep vein thrombosis?

These conditions can increase your risk of a deep vein thrombosis:

• Having an inherited (genetic) condition increases your risk of blood clots.
• Having cancer and some of its treatments (chemotherapy).
• Having a history of deep vein thrombosis in yourself or your family.
• Having limited blood flow in a deep vein because of an injury, surgery or immobilization.
• Not moving for long periods of time, like sitting for a long time on trips in a car, truck, bus, train or airplane or being immobile after surgery or a serious injury.
• Being pregnant or having recently delivered a baby.
• Being older than 40 (although a DVT can affect people of any age).
• Having overweight/obesity.
• Having an autoimmune disease, like lupus, vasculitis or inflammatory bowel disease.
• Using tobacco products.
• Having varicose veins.
• Taking birth control pills or hormone therapy.
• Having a central venous catheter or pacemaker.
• Having COVID-19.