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. For a variety of reasons, these valves can become defective, allowing the backflow of blood within veins. The subsequent pooling of blood and pressure increase within the vein, and weakens the blood vessel wall. Spider veins and varicose veins then develop from the engorgement and dilation of the affected blood vessels.
Varicose veins may not cause any pain. Signs you may have with varicose veins include:
Although spider veins and varicose veins may not always be entirely preventable, there are various measures you can take to reduce your chances of developing them. Prevention tips include: