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Deep Vein Thrombosis (DVT) is a medical condition in which a blood clot develops within a deep vein, most commonly in the lower leg, thigh, or pelvis. The clot can partially or completely obstruct blood flow and may cause swelling, discomfort, warmth, or redness in the affected area. However, some people may have DVT without noticeable symptoms.

Several factors can increase the risk of developing DVT. These include prolonged sitting or bed rest, recent surgery, serious injury, pregnancy, obesity, smoking, certain cancers, hormonal medicines, and previous episodes of blood clots. Long-distance travel and conditions that reduce movement can also contribute to clot formation.

DVT is important because a clot can sometimes break away and travel through the bloodstream to the lungs, causing a potentially life-threatening pulmonary embolism. Warning signs of pulmonary embolism may include sudden breathlessness, chest pain, rapid heartbeat, or coughing up blood.

Diagnosis may involve physical assessment, blood tests, and imaging such as Doppler ultrasound. Treatment commonly includes anticoagulant medicines to prevent the clot from growing and reduce the risk of further clots. Compression therapy and lifestyle measures may also be recommended in selected cases.

Early diagnosis and appropriate treatment can significantly reduce complications and support safer recovery.