Varicose veins are twisted veins that can be blue, red, or skin-colored. The larger veins may appear ropelike and make the skin bulge out. They are often found on the thighs, the backs and fronts of the calves, or the inside of the legs near the ankles and feet. During pregnancy, varicose veins can happen around the inner thigh, lower pelvic area, and buttocks. Whereas Spider veins, or thread veins, are smaller than varicose veins. They are usually red. They may look like tree branches or spider webs. Spider veins can usually be seen under the skin, but they do not make the skin bulge out like varicose veins do. They are usually found on the legs or the face.
Women are more likely to have varicose veins and spider veins. For many people, these are simply a cosmetic concern. For other people, it can cause aching pain and discomfort. Sometimes lead to more-serious problems.