The bluish veins that show up close to the surface of the skin on the inner or outer ankles and feet may have been there a while, and perhaps you feel a little unsure if they’re a problem. What are they? What causes them? Are they good, bad, or indifferent? Corona phlebectasia are the spider veins that can appear near the ankle and foot. They fan out like the sun’s corona, hence the name – and are larger than healthy capillaries. Essentially, these veins aren’t working as they should and may indicate venous disease.