A blood clot in a deep vein, usually in the legs, is called a deep vein thrombosis (DVT). A DVT can break loose and travel through the bloodstream to the lungs. Then the clot can block blood flow in the lungs (pulmonary embolism). This can be life-threatening. That's why it's important to take steps to prevent a clot.
8 Things You Can Do to Help Prevent Blood Clots
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