Deep Vein Thrombosis – A Guide
What is deep vein thrombosis (DVT)?Deep vein thrombosis refers to a blood clot (thrombus) in one of the deep veins, commonly in the lower leg.
What causes a DVT?
A deep vein thrombosis occurs when the blood clots abnormally and causes one of the deep veins to become blocked.
Risk factorsThere are several risk factors for developing a DVT:
- A family history of DVT or pulmonary embolism
- A previous DVT or pulmonary embolism
- Immobility, including being bed bound, and sitting for long periods
- Injury to the vein, e.g. trauma or surgery
- Blood clotting disorders in which the blood clots more easily than normal
- Overweight or obesity
- Medications or treatments that affect blood clotting, e.g, chemotherapy and radiotherapy.
SymptomsA DVT may cause some, all or none of the following symptoms in the area of the clot:
- A heavy ache in the affected area