Blood Clots Directory
Blood clots happen when substances in the blood clump together as a result of injury to a blood vessel. The substances, called platelets, "plug" the damaged area to prevent blood leakage. Trouble or complications happen when the clot creates a blockage. Clots create other potential problems when bits of them break off and travel to other parts of the body. When clots travel to other parts of the body and cause a blockage, there is the potential for a stroke, clots in lungs (called pulmonary embolism) or clots in the deep veins of the body (called deep vein thrombosis). Follow the links below to find WebMD's comprehensive coverage about what causes blood clots, what they look like, how to treat them, and much more.
Medical Reference
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Blood Clots
Blood clots stop bleeding, but they can also form in the body when they're not needed - and lead to stroke or heart attack. WebMD explains how the blood clots for better and worse.
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Types of Blood Clots
Not all blood clots are created equal. WebMD explains the different types, why they happen, and common symptoms.
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Could I Get a DVT?
Deep vein thrombosis (DVT) is a type of blood clot that forms in a vein deep inside your body. WebMD explains what puts you at risk and offers ways to prevent it.
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What Is Venous Thromboembolism?
Find out about the causes and treatments of a blood clot called venous thromboembolism (VTE) and what you can do to prevent it.
Slideshows & Images
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Slideshow: Surprising Causes of DVT
Long flights aren't the only thing that put you at risk for deep vein thrombosis. Find out about lesser-known causes of potentially life-threatening blood clots.
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Slideshow: A Visual Guide to Deep Vein Thrombosis
A painful, swollen leg may be one sign of a dangerous clot. This slideshow explains the symptoms, treatments, and prevention of deep vein thrombosis (DVT).
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Slideshow: A Visual Guide to Heart Disease
WebMD provides a visual overview of heart disease, including symptoms to watch for, diagnostic tests, treatments, and prevention strategies.
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Stroke: What You Need to Know
Pictures help explain the symptoms, causes, and dramatic lifesaving treatments for stroke -- including when to call 911.
Patient Education
Quizzes
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Quiz: The Truth About Deep Vein Thrombosis (DVT)
Separate fact from fiction. Where and how do these blood clots form? And what can you do to prevent them?
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Quiz: Blood Clots - Your Body's Built-In Bandage
Test your knowledge about how, when, and why blood turns from liquid to solid -- and why it matters.
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Quiz: Myths and Facts About Your Heart Health
Do you know how to keep your heart healthy? Take this quiz and find out.