First we must know the normal functioning of the Circulatory System: Arteries are the vessels that carry blood from your heart to the rest of your body. Veins return the blood. to your heart, so the blood can be recirculated. This requires the veins in your legs to work against gravity. Muscle contractions in your lower legs act as pumps, and elastic vein walls help blood flow back to your heart. Tiny valves in your veins open as blood flows toward your heart, then close to stop blood from flowing backward. When these valves weaken, they allow blood to flow backwards and pool in your veins, causing the veins to become enlarged. When varicose veins show up in the ankles, it is because weight bearing. increases pressure on the. veins in the lower body, weakening the veins and causing them to lose elasticity.
Contributing factors
Obesity
Circulatory disorders
pregnancy
Standing for long periods of time
Sitting for long periods of time
