Deep Vein Thrombosis: Causes, Symptoms, and Treatment
Medically reviewed by Achuta Uppu, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Deep Vein Thrombosis?
A vascular medicine doctor, who treats blood vessel problems, or a hematologist, who treats blood clotting problems, usually cares for deep vein thrombosis. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is deep vein thrombosis?
Deep vein thrombosis, or DVT, happens when a blood clot forms in a deep vein. It most often forms in the lower leg, thigh, or pelvis. It can also form in an arm.
The most serious problem is that part of the clot can break off and travel through the blood to the lungs. That blockage is called a pulmonary embolism, or PE. A PE can be life-threatening.
DVT does not cause heart attack or stroke. Those problems can come from a clot in an artery instead.
Symptoms
About half of people with DVT have no symptoms at all. When signs do appear, they show up in the affected leg or arm. The most common signs are:
- Swelling.
- Pain or tenderness.
- Warmth.
- Redness or discoloration.
You can have a PE without any DVT symptoms. Signs of a PE can include:
- Difficulty breathing.
- A faster than normal or irregular heartbeat.
- Chest pain or discomfort that usually gets worse with a deep breath or coughing.
- A cough or coughing up blood.
- Very low blood pressure, lightheadedness, or fainting.
Causes and who gets it
Almost anyone can have a DVT. Some things raise the chance. They include an injury to a vein and slow blood flow from limited movement. Certain long-term medical illnesses, older age, and a family history can also raise the risk. So can higher levels of estrogen, a hormone that plays a key role in a female's reproductive health.
How doctors diagnose it
Your doctor will ask about your medical history and your symptoms and will do a physical exam. You may also need imaging or blood tests. The diagnosis needs special tests that only a doctor can do.
A D-dimer test is a blood test. It measures a substance that is released when a clot dissolves. High levels of that substance can mean you have DVT. If earlier tests cannot settle the question, other imaging tests can look at how well blood flows through your veins.
Treatment
The main treatment is medicine. Blood thinners keep blood clots from getting larger and stop new clots from forming. Warfarin and heparin are conventional blood thinners. Newer blood thinners are called direct oral anticoagulants, or DOACs.
You may get a shot, take a pill, or have an IV. You may need blood thinners for several months or for a lifetime. Bleeding is a possible side effect, especially if you also take medicines such as aspirin.
Other treatments are used for serious clots. Thrombolytics are medicines that dissolve large clots. Because they can cause sudden bleeding, they are used only for serious and potentially life-threatening events such as a PE. Some people who cannot take blood thinners may need a vena cava filter. The filter catches blood clots before they travel to the lungs.
Compression stockings are sometimes recommended to relieve pain and swelling. In severe cases, the clot might need to be removed surgically.
One-third to one-half of people who have a DVT develop a long-term problem called post-thrombotic syndrome. The clot damages the valves in the vein, which can cause swelling, pain, and discoloration.
When to see a doctor
DVT needs prompt medical attention. If you have swelling, pain, warmth, or redness in a leg or arm, see your doctor as soon as possible.
Call 911 or go to the emergency room right away for any sign of a PE, which needs immediate medical attention. These signs are trouble breathing, chest pain or discomfort, coughing up blood, a fast or irregular heartbeat, lightheadedness, or fainting.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. A direct primary care doctor can review your risk factors and symptoms and send you for urgent testing if a clot is possible. They can also help you keep up with follow-up visits and specialist care.
Common questions
Can deep vein thrombosis cause a heart attack or stroke?
No, DVT does not cause heart attack or stroke. The danger is that a piece of the clot can reach the lungs and cause a PE.
What is the difference between DVT and a pulmonary embolism?
The difference is that a DVT is a blood clot in a deep vein. A PE happens when a piece of a clot breaks off and travels to the lungs.
Does deep vein thrombosis always cause symptoms?
No, it does not. In fact, about half of people with DVT have no symptoms at all.
Can deep vein thrombosis be prevented?
Yes, DVT is often preventable. Move around as soon as possible after being confined to bed. When you sit for a long time, such as on a trip longer than 4 hours, get up and walk around every 1 to 2 hours.
How long do people take blood thinners for deep vein thrombosis?
It depends on the person. You may need blood thinners for several months or for a lifetime.
Sources
- CDC - About Venous Thromboembolism (Blood Clots)
- NHLBI - Venous Thromboembolism - Diagnosis
- NHLBI - Venous Thromboembolism - Treatment
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
