Skip to content

    Deep Vein Thrombosis Health Center

    Font Size

    Symptoms and Tests for Deep Vein Thrombosis (DVT)

    Deep vein thrombosis -- a blood clot in a deep vein, often in your leg -- can look like many other health problems. And half the time, DVT causes no symptoms.

    If you're over 60, you smoke, you're overweight, or you sit for long periods of time, your risk for the condition is higher -- so stay alert for some possible signs of a problem. Talk to your doctor as soon as possible if you think you might have DVT.

    Recommended Related to DVT (Deep Vein Thrombosis)

    10 Questions to Ask Your Doctor About DVT

    1. What is DVT? And how dangerous is it? DVT stands for deep vein thrombosis, a blood clot in one of your body's deep veins, usually within a muscle of your leg. The biggest danger is that part of the clot could break off and travel to your lungs. It could cause a blockage known as a pulmonary embolism, or PE. Your doctor will talk to you about how likely that is to happen with your clot. 2. Are you sure I have a DVT? How is it diagnosed? People with a deep-vein clot in their leg...

    Read the 10 Questions to Ask Your Doctor About DVT article > >

    Blood Clot Symptoms

    Call your doctor's office if you have these symptoms, especially if they appear suddenly:

    • Swelling in one or both legs
    • Pain or tenderness in one or both legs, even if it's just when you stand or walk
    • Warm skin on your leg
    • Red or discolored skin on your leg
    • Veins you can see
    • Tired legs

    If you have a blood clot and it breaks free, it could travel to your lungs. That's called a pulmonary embolism, and it can be deadly. Like DVT, it may not cause symptoms.

    Call 911 or go to an emergency room right away if you notice:

    • Sudden coughing, which may bring up blood
    • Sharp chest pain
    • Rapid breathing or shortness of breath
    • Severe lightheadedness

    Get a Diagnosis

    Your doctor will ask about your health, medical history, and symptoms, and she'll do a physical exam. You may also need to have tests to rule out other problems or to confirm the diagnosis.

    Duplex ultrasound. This test doesn't hurt, it doesn't put anything inside your body, and there's no radiation like with an X-ray. The doctor spreads warm gel on your skin and then rubs a wand over the area where he thinks the clot could be. The wand sends sound waves into your body and relays the echoes to a computer, which makes pictures of your blood vessels and sometimes the blood clots. Someone who is specially trained has to look at the images to explain what's going on.

    This test isn't so good for finding blood clots very deep inside the body, such as in your pelvis.

    Venography. This is a special X-ray. The doctor injects a radioactive dye into a vein on the top of your foot before it's taken to help him see your veins and maybe a clot.

    Today on WebMD

    TAG dvt blood clot
    Symptoms, causes, risk factors, and more.
    businesswoman in airport
    Tips to prevent another clot.
    blood thinners
    Tips for DVT.
    Blood clots in artery
    Causes and treatments.
    Simple Steps to Lower Cholesterol
    Having Surgery Tips To Reduce DVT Risk And More
    New DVT Therapies On The Horizon
    Atrial Fibrillation Guide

    WebMD Special Sections