What causes spider veins?

Spider veins are usually caused by venous insufficiency; they are a symptom of veins deeper down in the leg or in the body backing up with blood. In this video, cardiothoracic surgeon David Greuner, MD, explains exactly how spider veins develop.

Spider veins are common and usually harmless. But if you’re bothered by them, here’s what you can do about it.

Why people with diabetes may need to take extra precautions during certain types of exercise.

An overview of cholesterol, including the different types of cholesterol and treatment for high cholesterol.

There are steps you can take to lower your risk.

The relationship between sleep and heart health may be a two-way street. Here’s what you need to know to improve both.