There's a reason you're often told to walk the length of a plane when travelling long distances, and it's not to get a better view.
Inactivity has long been associated with blood clots, also known as deep vein thrombosis. But sitting still isn't the only thing that increases your risk of developing these painful lumps.
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In the slideshow below, Dr. James Douketis, president of Thrombosis Canada, shares nine important facts about blood clots, including causes, signs to look for and suggestions for at-home pain relief.
If you suspect you have a blood clot, see a medical professional immediately to start treatment.
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