We cannot treat your genetic predisposition to develop varicose or spider veins so that new veins may reappear in the same area or other areas. Usually, a touch-up treatment to remove new veins will be needed every 1-3 years. Will my varicose veins go away completely after one treatment? When treated with Endovenous Laser Ablation (Endolaser, EVLT) the vein that was treated will go away completely. However, these veins are usually accompanied by smaller varicose veins and spider veins that will need to be taken care of with additional treatments.