Deep Vein Thrombosis (DVT)
Last Updated: July 3, 2026
Key Points
- DVT is a blood clot in a deep vein, usually in the leg
- It can be dangerous if the clot travels to the lungs (pulmonary embolism)
- Symptoms include pain, swelling, and skin changes in the affected area
- Treatment involves blood-thinning medicines to prevent further clots
Overview
Deep Vein Thrombosis (DVT) occurs when a blood clot forms in one of the deep veins, most often in the leg. While it can happen in other parts of the body, leg DVT is the most common. This condition can be serious because a part of the clot might break off and travel to the lungs, causing a life-threatening condition called a pulmonary embolism. DVT can develop for various reasons, including prolonged immobility, recent surgery, certain medical conditions, and lifestyle factors. It's crucial to seek medical help quickly if you suspect you have DVT to prevent serious complications. Diagnosis typically involves an ultrasound scan to confirm the presence of a clot. Treatment usually includes blood-thinning medications to dissolve the clot and prevent new ones from forming, alongside lifestyle adjustments to support recovery and reduce future risk.
Signs and Symptoms
- Throbbing pain in one leg, often calf or thigh
- Swelling in one leg
- Red, blue, or darkened skin around the painful area
- Swollen veins that may be tender to touch
- Shortness of breath or chest pain (seek immediate help)
Things That Increase the Risk
- Being over 60 years old
- Being overweight or obese
- Having a history of DVT
- Taking HRT or combined contraceptive pills
- Having cancer or heart failure
- Recent hospital stay or surgery
- Being confined to bed for three or more days
- Long journeys (over 4 hours) by plane, car, or train
- Pregnancy or having given birth in the last 6 weeks
- Dehydration
Diagnosis
- Doctor's assessment based on symptoms
- Urgent referral to hospital within 24 hours
- Ultrasound scan to check blood flow in the vein
Treatment & Management
- Blood-thinning medicines (anticoagulants)
- Usually taken for at least 3 months
- Blood-thinning injections during pregnancy and postpartum
- Staying active, such as regular walking
- Keeping the affected leg raised when sitting
- Delaying flights or long journeys for at least 2 weeks after starting medication
Prevention
- Maintain a healthy weight
- Stay active with regular walks
- Drink plenty of fluids to avoid dehydration
- Avoid sitting still for long periods, move around hourly
- Do not smoke
- Limit alcohol intake
- Wear loose clothing during long journeys
- Walk around when possible during long journeys
- Use compression stockings if advised by healthcare team
Available Treatments
Explore our range of treatment options for Deep Vein Thrombosis (DVT):
Surgical Options
Learn about surgical procedures available for Deep Vein Thrombosis (DVT):
Contents
Quick Info
Affects
Deep veins, usually legs
Prevalence
More common with age, immobility
Diagnosis
Ultrasound scan
Treatment
Blood-thinning medicines
Medically Reviewed
Dr. Vijay Bhat
Orthopedic Surgeon · Apollo Hospitals, Chennai
Reviewed on July 3, 2026
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