Many athletes and naturally lean people have highly visible veins, particularly on their arms, hands, legs, and feet. If the veins have always looked this way and there is no pain, swelling, tenderness, or other unusual symptoms, they are often simply a normal feature of the body.
However, a sudden change deserves more attention. Veins that unexpectedly become swollen, twisted, painful, or tender may indicate an underlying circulation problem. New heaviness or swelling in the legs can also be a warning sign that blood is not flowing normally through the veins.
One possible cause is chronic venous insufficiency, a condition in which blood has difficulty returning from the legs toward the heart. This can contribute to varicose veins, aching, swelling, and a feeling of heaviness, particularly after standing for long periods.
