You can have no blood clot risk factors and still develop one — which is one reason why it’s important to know the warning signs.

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    Blood clots affect everyone differently, but there usually are definite symptoms, says vascular medicine specialist Michael Tran, DO . To help unravel the mystery surrounding blood clots, Dr. Tran shares six of the most common blood clot warning signs.

    What are blood clots?

    A blood clot is blood that has partially solidified in a blood vessel. Blood vessels are your body’s highway system. They provide the roads that blood uses to travel from your heart to the rest of your body. There are three kinds of blood vessels:

    • Arteries, which carry blood away from your heart.
    • Veins, which carry blood back to your heart.
    • Capillaries, which connect your arteries and veins.

    Blood clots can occur anywhere along the 60,000 miles of blood vessels in your body, but they’re most likely to happen in veins (venous blood clots). The most common kinds of venous blood clots are:

    • Deep vein thrombosis (DVT) . A DVT most often forms in your legs in the deep veins of your body. Thrombosis is when clots stay put and block blood flow.
    • Pulmonary embolism (PE) . If a DVT breaks off and travels to your lungs, it can create a pulmonary embolism. Embolisms are blood clots that break free and travel to other parts of your body.

    Less common, thankfully, are arterial clots. These occur when a blood clot clogs an artery. “They are a whole different beast,” says Dr. Tran. “The clot can block oxygen from reaching the heart or brain, leading to a heart attack or stroke.”

    What are the signs of a blood clot?

    Early signs of a blood clot can be hard to identify. “Everyone has different symptoms that can range from none to severe,” notes Dr. Tran. “But there are common signs and symptoms of blood clots to be aware of.”

    Here are six of them.

    Signs of a DVT

    DVTs can occur in your legs or arms. The most common signs of a blood clot in your leg include:

    Swelling

    Most people typically have some degree of leg swelling, especially near the end of the day. “That’s not the swelling we worry about,” says Dr. Tran. Instead, watch for swelling that:

    • Occurs suddenly or more dramatically than usual.
    • Lingers throughout the day.
    • Doesn’t get better with leg elevation.

    Leg pain

    New leg pain — such as a calf cramp or charley horse — could signal a blood clot in the leg. But if the pain only lasts for a few seconds and doesn’t come back, it’s probably not a blood clot.

    Blood clot symptoms don’t come and go quickly,” says Dr. Tran. “They stay.”

    Varicose vein changes

    If you have varicose veins , warning signs of a DVT include:

    • A vein that bulges out and does not flatten when you lay flat or raise your leg. “This could be a sign of a superficial or small blood clot in the varicose vein,” notes Dr. Tran.
    • A vein that suddenly hardens.
    • Skin around a varicose vein becoming tender and red.

    Signs of a blood clot in an arm are similar to the legs but often more noticeable if there’s swelling. Also, arms may turn slightly purple — particularly in your forearm or hand ­— because of the congestion caused by the blood clot, says Dr. Tran.

    Signs of a pulmonary embolism

    Symptoms of a pulmonary embolism often depend on:

    • The size of the clot.
    • Your age.
    • Your overall health.

    Some common signs of a blood clot in your lungs include:

    Shortness of breath

    Shortness of breath that’s new and different from what you’ve experienced before could be a sign of a blood clot in your lung — especially if the feeling lingers.

    “Breathlessness or becoming easily winded with mild exertion will last for hours, even days, if there is a blood clot,” notes Dr. Tran. “If you feel breathless for a second and then you’re OK, it’s probably not.”

    Chest pain

    While chest pain may signal a heart issue, it can also be a sign of a clot. The chest pain will be constant or happen when you take deep breaths.

    “It may feel like a shooting pain that starts in your front and travels to the back in the chest area,” says Dr. Tran. “You may also feel chest heaviness or pressure that lasts. If it’s just fleeting, goes away and doesn’t happen again, you’re probably not dealing with a blood clot.”

    Coughing up blood

    Another sign of a blood clot in your lung is coughing up blood. The sputum (spit or mucus) would have more than a tinge of blood in it, too: “It would be much more — teaspoons or tablespoons of blood,” notes Dr. Tran.

    What to do if you think you have a blood clot

    Your action plan may vary depending on if you suspect a pulmonary embolism vs. a deep vein thrombosis.

    If you think you have a pulmonary embolism

    Some pulmonary embolisms can be life-threatening, so go to the emergency room for a doctor’s evaluation if you notice any signs of a blood clot in your lungYour primary care doctor may send you to the ER so you can get a same-day lung scan, says Dr. Tran.

    The ER can rule out a pulmonary embolism with a CT scan or nuclear medicine ventilation profusion study,” says Dr. Tran. “A CT scan shows doctors your arteries. A nuclear medicine ventilation profusion study is a breathing test with a tracer.”

    If you think you have a DVT

    If your symptoms remain for more than a day or two and worsen, reach out to your primary care doctor. “Your doctor can help you decide your next steps,” recommends Dr. Tran.

    If you need help outside of your doctor’s regular business hours, go to the emergency room and not urgent care. “Urgent cares often can’t do ultrasounds, which is the test you need,” says Dr. Tran.

    The location of the suspected blood clot matters, too. For example, different leg locations are more worrisome than others.

    If the blood clot is in your calf, for instance, your doctor may monitor it by ultrasound with scans every few weeks. If it’s a high-risk blood clot, doctors will often prescribe a blood thinner within 24 hours.

    “But it’s not like a stroke where you need to get to the ER within three hours,” says Dr. Tran. “It’s OK to take a wait-and-see approach. Most patients come to us after they’ve had symptoms for several days and do just fine.”

    What are the signs of a blood clot in your lung?
    What are the symptoms of a pulmonary embolism?
    • Sudden shortness of breath (most common)
    • Chest pain (usually worse with breathing)
    • A feeling of anxiety.
    • A feeling of dizziness, lightheadedness, or fainting.
    • Irregular heartbeat.
    • Palpitations (heart racing)
    • Coughing and/or coughing up blood.
    • Sweating.
    more
    How long do you stay in the hospital for a blood clot in the lung?
    How long is hospitalization? The time a person spends in the hospital depends on how severe the clot is and whether the person's body is dissolving the clot on its own. Some people may not need to stay in the hospital at all, while others may require 1 week or more. more
    Can a blood test detect a blood clot in leg?
    A D-dimer test is used to find out if you have a blood clotting disorder. These disorders include: Deep vein thrombosis (DVT), a blood clot that's deep inside a vein. These clots usually affect the lower legs, but they can also happen in other parts of the body. more
    How long are you in hospital with a blood clot on the lung?
    How long is hospitalization? The time a person spends in the hospital depends on how severe the clot is and whether the person's body is dissolving the clot on its own. Some people may not need to stay in the hospital at all, while others may require 1 week or more. more
    How long does it take to dissolve a blood clot in the lung?
    A pulmonary embolism (PE) is caused by a blood clot that gets stuck in an artery in your lungs. That blockage can damage your lungs and hurt other organs if they don't get enough oxygen. It's a serious condition, and recovery can take weeks or months. Once you've had one, your chances of another go up. more
    Can a blood test detect a blood clot?
    A D-dimer test is used to find out if you have a blood clotting disorder. These disorders include: Deep vein thrombosis (DVT), a blood clot that's deep inside a vein. These clots usually affect the lower legs, but they can also happen in other parts of the body. more
    Can you get a blood clot when on blood thinners?
    If you're taking a blood thinner, is it still possible to get a blood clot? Answer From Rekha Mankad, M.D. Yes. more
    Can blood test detect blood clot in lung?
    Your doctor will order a D-dimer blood test to help diagnose or rule out the presence of a pulmonary embolism. The D-dimer test measures the levels of a substance that is produced in your bloodstream when a blood clot breaks down. more
    How do you know if you have a blood clot in your lung?
    Symptoms of a blood clot in the lungs (pulmonary embolism) sudden shortness of breath that isn't caused by exercise. chest pain. palpitations, or rapid heart rate. breathing problems. more
    What are the chances of surviving a blood clot in the lung?
    Pulmonary embolism can be life-threatening. About one-third of people with undiagnosed and untreated pulmonary embolism don't survive. more
    Can a blood clot move while on blood thinners?
    Blood thinners. Blood thinners are also used to help prevent clots after a stroke or pulmonary embolism (when a blood clot travels to an artery in your lungs). Blood thinners don't dissolve the clot, but they can stop it from getting bigger and keep new ones from forming. That gives your body time to break up the clot. more

    Source: health.clevelandclinic.org

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