Deep vein thrombosis (DVT) is a blood clot that forms in a vein deep inside the body. It usually involves the legs, but occasionally affects other veins. The clot blocks blood flow through the vein. It can break off and travel to the lungs. This is different from a clot near the skin that does not break off.
Signs and Symptoms
- Swelling, pain and redness in the ankle, calf or thigh (swelling may extend to everything below the clot including your toes)
- Soreness or pain with walking that does not disappear with rest
- Fever (sometimes).
Causes
Pooling of blood in the vein can lead to clotting. The pooling may occur after prolonged sitting or bed rest following surgery or a debilitating illness (such as a heart attack or stroke).
Risk Factors
Obesity
Smoking
Age over 60
Pregnancy
Oral contraceptive use
Cancer
Surgery or trauma
Inactivity (prolonged sitting).
Preventive Measures
- Avoid prolonged bed rest during illnesses
- Exercise your legs at least every one or two hours, especially on long trips
- Stop smoking especially if you take oral contraceptives.
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