![]() If your doctor thinks that you have DVT, you probably will have an ultrasound test to measure the blood flow through your veins and help find any clots that might be blocking the flow. If a blood clot is small, it may not cause symptoms. Pain may get worse and last longer or become constant. The calf or thigh may ache or feel tender. The leg or arm may swell, feel warm, or look red. Symptoms of DVT include swelling of the affected leg or arm. Surgery or an injury to the blood vessels can also cause a blood clot. What causes it?Ĭauses of a blood clot in a deep vein (DVT) include slowed blood flow, which can happen when you're not active for long periods of time, and abnormal clotting problems, which make the blood clot too easily or too quickly. Diagnosis and treatment of DVT in other parts of the body are similar. It may damage the vein and cause the area near the clot to ache, swell, and change colour.īlood clots most often form in the calf and thigh veins, and less often in the arm veins or pelvic veins. DVT can also lead to long-lasting problems. ![]() ![]() Pulmonary embolism is often life-threatening. These clots are dangerous because they can break loose, travel through the bloodstream to the lungs, and block blood flow in the lungs (pulmonary embolism). These clots require medical care right away. Condition Basics What is deep vein thrombosis (DVT)?ĭeep vein thrombosis (DVT) is a blood clot (thrombus) in a deep vein, usually in the legs.
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