Risk factors

Anyone can get a blood clot. But the following things make a blood clot more likely to happen:

• Being inactive for a long period, such as when you’re in the hospital, or traveling by plane or car

• Injury to a vein from an accident, a broken bone, or surgery

• Having blood clots in the past or a family history of blood clots

• Having a blood clotting disorder

• Recent surgery

• Having cancer and certain cancer treatments

• Smoking

Other things can also put you at higher risk for a blood clot. They include:

• Being older than 60

• Being pregnant

• Taking birth control pills or hormone replacement

• Having other vein problems, such as varicose veins 

• Being overweight

• Having a pacemaker or a central venous catheter. They increase the chance of a blood clot forming in an arm.

• Using injected medicines. This also increases the chance of a blood clot forming in an arm.

Call 911

If you have symptoms of a blood clot in your lungs, call 911. The symptoms are:

• Chest pain

• Sudden shortness of breath

• Trouble breathing

• Fast heartbeat (palpitations)

• Coughing (may cough up blood)

• Sweating

• Fainting, dizziness, lightheadedness

• Anxiety

When to call your healthcare provider

If you have symptoms of a blood clot, call your healthcare provider. The symptoms are:

• Pain

• Swelling

• Redness or change in color in a leg, arm, or other area 

How to prevent DVT

Preventing a blood clot means improving blood flow back to your heart. To help prevent a blood clot:

• Talk with your healthcare provider about a program of regular exercise.

• If your legs feel swollen or heavy, take a break and sit comfortably or lie down with your feet up.

• Stay at a healthy weight.

• Quit smoking, if you smoke.

• Don't sit, stand, or lie down for long periods without moving your legs and feet:

  • When traveling by car, stop often to get out and move around.

  • On long airplane, train, or bus rides, get up and move around when possible.

  • If you can’t get up, wiggle your toes, and tighten your calves to keep your blood moving, as pictured below.

If you need to have surgery, talk with your provider about a plan to prevent blood clots. 

Your risk for blood clots increases if you are in the hospital. Your provider may prescribe blood-thinner medicine (anticoagulant) to help prevent blood clots. Or they may prescribe a sequential compression device (SCD) or intermittent pneumatic compression (IPC). These devices have sleeves that fit around your legs. They put gentle pressure on your legs to help with blood flow and prevent blood clots. Remove the sleeves so that you don't trip or fall when you are walking, such as when you use the bathroom or shower. If you need help removing the sleeves, ask the nurse or aid. You may also want to try the following: