Have you taken a long flight lately? If you have, you may have felt the cramps in your legs. Sitting in a tight place for a long
period of time without any activity
could leads to a condition called deep-vein thrombosis (DVT). It is caused by a blood clot in a deep vein. Symptoms of the condition include pain, swelling, redness, warmness, and engorged superficial veins in the legs. This condition could go away naturally. But in some instances thrombosis, blood clot could travel into your lungs and cause pulmonary embolism (PE). DVT could lead to serious medical condition such as cancer and trauma. In order to avoid a serious medical condition caused by DVT, you can do few things while you are travelling long distances by air.
Walk inside the cabin at least once every hour. If you are unable to do that draw the alphabet with your toes or do seated calf raises. Combined with walk these activities will help blood circulation in your body to lessen the risk of clotting.
Drink fluid, water of course, as much as possible. Avoid alcohol and caffeine.
Avoid wearing tightly fitting cloths.
Wear compression socks to avoid leg swelling.