What Is Post-Thrombotic Syndrome?

Post-thrombotic syndrome is a condition that can develop after a deep vein thrombosis (DVT), which is a blood clot in a deep vein of the leg. The clot can damage the valves inside the veins that normally help blood flow back to the heart.

The condition develops because a blood clot damages the veins and affects normal circulation. This may lead to long-term swelling, pain, and skin changes. Risk factors include recurrent DVT, obesity, limited mobility, and blood clots located above the knee.

Symptoms

Symptoms of post-thrombotic syndrome may appear weeks or months after a DVT. Some people have mild symptoms, while others develop ongoing discomfort that affects daily activities.

Common symptoms include:

• Leg swelling
• Aching or heaviness in the leg
• Pain that worsens with standing or walking
• Cramping or tingling
• Enlarged veins
• Skin discoloration
• Dry or itchy skin
• Slow-healing sores or ulcers

How Is It Diagnosed?

Healthcare providers diagnose post-thrombotic syndrome by reviewing your symptoms, medical history, and history of DVT.

Testing may include:

• Physical examination
• Ultrasound imaging of the leg veins
• Evaluation of swelling and skin changes

These tests help providers assess blood flow and look for signs of vein damage.

How Is It Treated?

Treatment focuses on improving blood flow, reducing swelling, and preventing complications.

Treatment options may include:

• Compression stockings
• Leg elevation
• Exercise and walking programs
• Skin care treatments
• Wound care for ulcers
• Compression devices
• Vein procedures or surgery in severe cases

Many people benefit from daily movement and regular exercise to improve circulation. Following treatment recommendations after a DVT may also help reduce the risk of developing post-thrombotic syndrome.