Leg Swollen After a Long Car Drive—ER or Not?

After sitting for a long time, you notice one leg is swollen and your calf is painful. Should you go to the ER? Emergency physician Jeffrey Druck, MD, says the risk of a blood clot in your leg from sitting too long is reason to visit the ER. Find out why sitting for a long time during a car drive or plane flight can be dangerous, who can be at risk, and what you can do to prevent it.