DVT (deep vein thrombosis) (2024)

DVT (deep vein thrombosis) is a blood clot in a vein, usually in the leg. DVT can be dangerous. Get medical help as soon as possible if you think you have DVT.

Symptoms of DVT (deep vein thrombosis)

Symptoms of DVT (deep vein thrombosis) in the leg are:

  • throbbing pain in 1 leg (rarely both legs), usually in the calf or thigh, when walking or standing up
  • swelling in 1 leg (rarely both legs)
  • warm skin around the painful area
  • red or darkened skin around the painful area – this may be harder to see on brown or black skin
  • swollen veins that are hard or sore when you touch them

These symptoms can also happen in your arm or tummy if that's where the blood clot is.

DVT (deep vein thrombosis) (1)

Credit:

DR P. MARAZZI/SCIENCE PHOTO LIBRARY https://www.sciencephoto.com/media/440619/view

Urgent advice: Ask for an urgent GP appointment or get help from NHS 111 if:

  • you think you have DVT (deep vein thrombosis)

You can call 111 or get help from 111 online.

Immediate action required: Call 999 or go to A&E if:

You have symptoms of DVT (deep vein thrombosis), such as pain and swelling, and:

  • breathlessness
  • chest pain

DVT can be very serious because blood clots can travel to your lungs. This is called a pulmonary embolism.

A pulmonary embolism can be life-threatening and needs treatment straight away.

Who is more likely to get DVT (deep vein thrombosis)

A DVT (deep vein thrombosis) is more likely to happen if you:

  • are over 60
  • are overweight
  • smoke
  • have had DVT before
  • take the contraceptive pill or HRT
  • have cancer or heart failure
  • have varicose veins

There are also some times when you have a higher chance of getting DVT.

These include if you:

  • are staying in or recently left hospital – especially if you cannot move around much (like after an operation)
  • are confined to bed
  • go on a long journey (more than 3 hours) by plane, car or train
  • are pregnant or if you've had a baby in the previous 6 weeks
  • are dehydrated

Sometimes DVT can happen for no obvious reason.

How DVT (deep vein thrombosis) is diagnosed

If a doctor thinks you have DVT (deep vein thrombosis), you should be referred to hospital within 24 hours for an ultrasound scan. The scan shows whether blood is flowing normally through the vein.

You may also have an X-ray of the vein (venogram). For this, you'll be injected with a dye to show where the blood clot is.

Treatment of DVT (deep vein thrombosis)

You may have an injection of a blood-thinning medicine called heparin while you're waiting for an ultrasound scan to see if you have a DVT (deep vein thrombosis).

The main treatments include:

  • blood-thinning medicines, such as warfarin or rivaroxaban – you'll probably need to take these for at least 3 months
  • surgery to remove blood clots or stop them forming

If you get a DVT when you're pregnant, you'll have injections for the rest of the pregnancy and until your baby is 6 weeks old.

Recovery from DVT (deep vein thrombosis)

There are things you can do to help you recover from DVT (deep vein thrombosis).

After you leave hospital, you'll be encouraged to:

  • walk regularly
  • keep your affected leg raised when you're sitting
  • delay any flights or long journeys until at least 2 weeks after you start taking blood-thinning medicine

How to prevent DVT (deep vein thrombosis)

There are things you can do to lower your chance of getting DVT (deep vein thrombosis).

Do

  • stay a healthy weight

  • stay active – taking regular walks can help

  • drink plenty of fluids to avoid dehydration – DVT is more likely if you're dehydrated

Don’t

  • do not sit still for long periods of time – get up and move around every hour or so

  • do not cross your legs while you're sitting

  • do not smoke

  • do not drink lots of alcohol

Going on a long journey

If you're travelling for 3 hours or more by plane, train or car, there are things you can do during the journey to lower your chances of getting DVT.

These include:

  • wearing loose clothing
  • drinking plenty of water
  • avoiding alcohol
  • walking around when possible

Going into hospital

If you go into hospital, your healthcare team should check if there's a higher chance you'll get DVT.

If they think you're more likely to get DVT, you may be given treatment to prevent it, such as medicine or compression stockings (knee-high elastic socks that help your blood circulation), while you're in hospital.

You may continue treatment after you leave hospital because a blood clot can happen weeks later.

You can also help protect yourself against DVT while you're in hospital by:

  • staying active and walking around if you can
  • moving your toes (up and down) and ankles (in circles) if you have to stay in bed – your healthcare team may give you some exercises to do

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Page last reviewed: 22 March 2023
Next review due: 22 March 2026

DVT (deep vein thrombosis) (2024)

FAQs

What are the warning signs of deep vein thrombosis? ›

Clues of a Clot
  • swelling of the leg or along a vein in the leg.
  • pain or tenderness in the leg, which you may feel only when standing or walking.
  • increased warmth in the area of the leg that's swollen or painful.
  • red or discolored skin on the leg.
  • unexplained shortness of breath.
  • pain with deep breathing.
  • coughing up blood.

What is the main cause of DVT? ›

Anything that prevents the blood from flowing or properly clotting can cause a blood clot. The main causes of deep vein thrombosis (DVT) are damage to a vein from surgery or inflammation and damage due to infection or injury.

Is DVT in the leg an emergency? ›

It's important to call your doctor right away or go to the emergency room if you have symptoms of a DVT. Don't wait to see if your symptoms go away. Get treatment right away to prevent serious complications.

What can be mistaken for a DVT? ›

Medical conditions that have symptoms similar to DVT blood clots include:
  • Peripheral artery disease.
  • Varicose veins and spider veins.
  • Cellulitis.
  • Vasculitis.
  • Acute arterial occlusion.
  • Necrotizing fasciitis.
  • Nephrotic syndrome.
Sep 23, 2021

How do I check myself for deep vein thrombosis? ›

Symptoms to Lookout For

There are a few telltale signs that you may have DVT, which include pain, swelling, tenderness or redness in and around the suspected area. Some other signs include leg cramps, leg pain that becomes more severe when the foot is bent and skin discoloration.

What does the beginning of a DVT feel like? ›

Symptoms of DVT (deep vein thrombosis)

throbbing pain in 1 leg (rarely both legs), usually in the calf or thigh, when walking or standing up. swelling in 1 leg (rarely both legs) warm skin around the painful area. red or darkened skin around the painful area – this may be harder to see on brown or black skin.

Can DVT go away on its own? ›

Deep vein thrombosis usually occurs in the lower leg. It often goes unnoticed and dissolves on its own. But it may cause symptoms like pain and swelling. If someone is diagnosed with DVT, they will need treatment to avoid serious complications such as pulmonary embolism.

Which leg is more common for DVT? ›

Deep venous thrombosis (DVT) has been noted to occur as much as 60% more frequently in the left lower extremity than in the right lower extremity (1). Investigators since Virchow have suggested that this disparity may be related to compression of the left common iliac vein (LCIV) by the right common iliac artery (2).

What is the life expectancy after a DVT? ›

The mortality rate after venous thrombosis is about 20% within 1 y [2],[8]. Mortality is 2- to 4-fold higher for patients with pulmonary embolism (PE), of whom 10%–20% die within 3 mo after the event, than for patients with a deep vein thrombosis (DVT) of the leg [2],[9]–[11].

Should you walk if you have a DVT in your leg? ›

For most people, walking or taking care of some housework are fine right after you find out you have DVT. It's also OK right after a pulmonary embolism. Your doctor may prescribe a blood thinner -- they may call it an anticoagulant -- and compression stockings. Those help blood flow in your legs.

What are the 10 signs of a blood clot in your leg? ›

Get medical help right away if you notice any of these symptoms:
  • Swelling. This can happen in the exact spot where the blood clot forms, or your entire leg or arm could puff up.
  • Change in color. ...
  • Pain. ...
  • Warm skin. ...
  • Trouble breathing. ...
  • Lower leg cramp. ...
  • Pitting edema. ...
  • Swollen, painful veins.
Nov 11, 2022

What dissolves blood clots fast? ›

While many blood clots dissolve with the help of blood thinners, some dangerous clots require fast-acting clot-busting medications called thrombolytics. Because thrombolytics can cause severe bleeding, doctors usually give them only to people with large, severe clots that increase risk of pulmonary embolism.

Should I take aspirin if I think I have a blood clot in my leg? ›

If you visit a vein clinic or hospital for a blood clot and blood thinners are suggested to you, taking aspirin may be an option, instead. It is not for everyone, and will not be enough in all cases, but it does have a similar effect and may work well to reduce the chances of another blood clot in the future.

Does a blood clot in the leg hurt constantly? ›

Does blood clot pain come and go? Unlike the pain from a charley horse that usually goes away after stretching or with rest, the pain from a blood clot does not go away and usually gets worse with time.

Is it safe to use a heating pad on the leg with a DVT? ›

It is possible for DVT to resolve itself, but there is a risk of recurrence. To help reduce the pain and swelling that can occur with DVT, patients are often told to elevate their leg(s), use a heating pad, take walks and wear compression stockings.

Should I take aspirin if I think I have a blood clot? ›

If you visit a vein clinic or hospital for a blood clot and blood thinners are suggested to you, taking aspirin may be an option, instead. It is not for everyone, and will not be enough in all cases, but it does have a similar effect and may work well to reduce the chances of another blood clot in the future.

Is walking good for thrombosis? ›

Aerobic activity -- things like walking, hiking, swimming, dancing, and jogging -- can also help your lungs work better after a pulmonary embolism. Studies show that exercise also can improve symptoms of DVT, including swelling, discomfort, and redness. Physical activity can also make you feel more energized.

Can deep vein thrombosis go away on its own? ›

Deep vein thrombosis usually occurs in the lower leg. It often goes unnoticed and dissolves on its own. But it may cause symptoms like pain and swelling. If someone is diagnosed with DVT, they will need treatment to avoid serious complications such as pulmonary embolism.

How do you know if a blood clot is coming? ›

throbbing or cramping pain, swelling, redness and warmth in a leg or arm. sudden breathlessness, sharp chest pain (may be worse when you breathe in) and a cough or coughing up blood.

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