New Delhi, July 18 -- Swollen legs led to President Donald Trump being diagnosed with what's called chronic venous insufficiency. It's a fairly common condition among older adults but requires a thorough checkup to rule out more serious causes of swelling in the legs. Here are some things to know.

What is chronic venous insufficiency?

Chronic venous insufficiency, or CVI, happens when veins in the legs can't properly carry blood back to the heart. That can lead to blood pooling in the lower legs. In addition to swelling, usually around the feet and ankles, symptoms can include legs that are achy, heavy feeling or tingly, and varicose veins. Severe cases could trigger leg sores known as ulcers.

What causes chronic venous insufficiency?...