However, if the varicose veins become very deep and there is a change in skin color, associated with the appearance of ulcers over the affected skin or a continuous pain that refuses to go away, medical attention is required. Usually, the doctor will suggest a laser treatment. For milder superficial veins, sclerotherapy, in which sclerosing agent, a chemical, is injected in the veins to break down its walls. In severe cases, the doctors suggest surgery to treat very large and bulging varicose veins.