What is deep vein thrombosis?
Deep vein thrombosis is a clot in a deep vein, often in a leg.
Symptoms, causes and assessment
One-sided swelling, pain, warmth or discoloration can occur, but symptoms may be subtle. Immobility, surgery and personal risk factors matter. Appearance alone cannot confirm it; clinical assessment and sometimes ultrasound are needed.
Care and when to seek help
A clot can travel to the lungs. Seek prompt assessment if suspected; sudden breathlessness, chest pain or fainting needs emergency help. The need and duration of anticoagulation are individualized.
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