Overview Veins appear blue because of the way light interacts with your skin, not because the blood inside them is blue. When light penetrates the skin, red wavelengths travel deeper while blue wavelengths are absorbed and reflected back to your eyes, creating the...
Overview Heavy, weak legs are often a sign that your circulation, veins, or muscles are not functioning at their best. Blood pooling in the lower legs, weakened vein valves, and reduced blood flow are among the most direct causes of that dragging, tired sensation....
