Spider veins are small abnormally enlarged reddish or bluish vessels located at the surface of the skin. They can look like tree branches or spiderwebs with their short, jagged lines. They can be found on the legs and face and can cover either a very small or very large area of skin. Spider veins are like varicose veins but smaller. They can also can symptoms such as leg pain, itching, aching, burning and throbbing, just like larger veins.
In contrast to what most people think, spider veins are not only cosmetic but can actually cause symptoms, including swelling and heaviness of the legs. This may be in part because small spider veins can be a sign of underlying venous insufficiency or venous reflux disease.