In your leg, you have two sets of veins. They are called deep veins and superficial veins. Deep veins are in the deeper part of the leg where the muscles are, and superficial veins are right under the skin. In a normal person, the blood circulates from the feet toward the heart in both veins. When someone has venous insufficiency, the blood will go up the deep veins and back into the superficial vein. The blood will start pooling in the superficial veins. Since the superficial veins are closest to the skin, they will bulge and create varicose veins. They are often bluish or purple. Spider Veins are essentially a smaller version of varicose veins. They are red, purple, and blue vessels that are also twisted and turning. They are most often seen on the legs, chest, or face.