President Donald Trump was examined for swelling in his legs and has been diagnosed with chronic venous insufficiency, the White House announced Thursday.

Health experts say chronic venous insufficiency is the most common vascular disease in the country. What is it?

The memo also detailed that POTUS underwent “bilateral lower extremity venous Doppler ultrasounds were performed and revealed chronic venous insufficiency, a benign and common condition, particularly in individuals over the age of 70.