Your veins rely on elastic walls and a series of small one-way valves to ensure blood travels towards the heart instead of pooling in your legs and ankles. Vein wall elasticity decreases as people age, increasing the chance of swollen, knotted varicose veins. Heredity, gender, and occupational requirements like having to stand for long periods of time can also contribute to this issue. Fortunately, there are a number of safe, effective, and virtually pain-free treatments available to address vein issues before complications occur.