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You have thrombosis [throm-BOH-sis] when you have a blood clot in your body. Another word for a blood clot is a thrombus. A blood clot can be superficial [soo-per-FISH-uhl] if it is near the surface of the skin. Sometimes a superficial clot will move deeper. Other times, a blood clot will form in the deep tissues, and that is called deep vein thrombosis (DVT). Most of the time, a DVT is a blood clot deep in the leg.
DVTs are dangerous. They can damage the valves in your veins, leading to chronic pain and swelling. They can also break loose and travel in your veins. A blood clot that has broken loose is called an embolism [EM-buh-liz-um]. If it has travelled to the lungs, it is called a pulmonary [PUHL-moh-ner-ee] embolism or PE. A PE can be life threatening.
Often deep vein thrombosis has no noticeable symptoms. If you do have symptoms, they can include:
Sometimes the first noticeable symptoms are from a pulmonary embolism. These symptoms can include:
If you experience symptoms of pulmonary embolism, call 911 and get medical help immediately.
You should seek medical help right away if you have symptoms of thrombosis, including deep vein thrombosis:
Call 911 if you have any of these signs of pulmonary embolism:
Blood clots can be caused by anything that slows or stops the flow of blood in your body. This can include inactivity, surgery, injury, or inherited factors. Risk factors include:
There are two main reasons you are at higher risk during pregnancy and the first 6 weeks after giving birth:
Your risk of DVT is increased further if you’re on bed rest during pregnancy or recovering from a C-section (cesarean section) birth.
If your doctor suspects you have DVT, you may be given one or more of these tests:
DVT needs to be treated right away. The goal of treatment for DVT is to prevent the blood clot from getting bigger or becoming an embolism (breaking off and traveling toward the lungs). Treatment also aims to keep you from getting more blood clots. Your treatment may include one or more of the following:
If you're at risk of having DVT or emboli, or have had one before, take these measures to help prevent having one in the future:
If you are on bed rest or recovering from a C-section, your care team may suggest these preventive steps:
All pregnant women and women recovering from childbirth should follow these general measures for preventing DVT: