varicose veins causes
This causes the veins to swell, which can lead to varicose veins. Many factors can raise your risk for varicose veins. Examples of these factors include family history, older age, gender, pregnancy, overweight or obesity, lack of movement, and leg trauma.
Veins carry blood low in oxygen content from the body to the lungs and heart. Varicose veins can lead to aching or even ulceration of the legs. Varicose veins can be caused be weakened valves in the veins or weakened walls of the veins, or by inflammation in the veins (phlebitis). Varicose veins and spider veins are not dangerous (with rare exceptions).
Spider veins and varicose veins are caused by structural abnormalities of blood vessels. Veins carry blood back to the heart from other parts of the body. They utilize a series of one-way valves to avoid backflow of blood.
Normally, one-way valves in your leg veins keep blood moving up toward the heart. When the valves do not work properly, they allow blood to back up into the vein. The vein swells from the blood that collects there, which causes varicose veins. Varicose veins are common, and affect more women than men. They do not cause problems for most people. However, if the flow of blood through veins becomes worse, problems such as leg swelling and pain, blood clots, and skin changes may be present.