President Trump’s bruised hand and his apparent use of makeup to cover the discolored patch of skin have renewed attention to his health in general and his cardiovascular health in particular. His case also highlights an often underrecognized and undertreated condition.

It’s called chronic venous insufficiency, or CVI for short, and by some estimates approximately 2.5 million people in the United States may live with its signature symptom of swollen legs, whether they’ve received a diagnosis or not. Bruised hands are another matter, experts told STAT.

People don’t necessarily know that they have CVI, thinking their leg swelling at the end of a day spent on their feet is normal. While that can be true, pooling of blood in the legs can also be caused by CVI, in which the blood doesn’t re

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