President Donald Trump was evaluated by the White House medical unit after swelling in his legs, the administration revealed on Thursday. The revelation comes after images of the president’s swollen ankles and bruising on his hand raised questions over the 79-year-old’s health.

President Donald Trump has swelling in his legs that is caused by a condition that lowers the effectiveness of some veins, a recent medical diagnosis says.

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