United States President Donald Trump has been diagnosed with chronic venous insufficiency (CVI) after undergoing evaluation for lower leg swelling and hand bruising, the White House has announced.

Press Secretary Karoline Leavitt said on Thursday that the diagnosis was made after the president experienced mild discomfort in his legs over several weeks.

In a publicly released letter, President Trump’s physician, Dr Sean Barbabella, confirmed there was no evidence of deep vein thrombosis or arterial disease. All of Trump’s lab results were within normal limits.

“An echocardiogram was also performed, and confirmed normal cardiac structure and function,” the letter added.

But what is chronic venous insufficiency, and how risky is it? Here is what we know:

What is chronic venous insuffic

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