Sitting during a long flight or car ride can cause swollen ankles and calves. The inactivity also increases your risk of thrombophlebitis in the veins of your legs. To help prevent a blood clot from forming:

  • Take a walk. If you're flying, walk around the airplane cabin once an hour or so. If you're driving, stop every hour or so and walk around.
  • If you must stay seated, move your legs regularly. Flex your ankles, or carefully press your feet against the floor or footrest in front of you at least 10 times each hour.

On flights or for car rides lasting more than four hours, take additional precautions to reduce your risk of deep vein thrombosis:

  • Avoid wearing tight clothing.
  • Drink plenty of nonalcoholic fluids to avoid dehydration.
  • Stretch your calves by walking at least once an hour.

If you're at increased risk of deep vein thrombosis, talk to your doctor before your flight. He or she may recommend that you use:

  • Compression stockings
  • Any prescribed blood-thinning medication as directed
Feb. 22, 2014