Ultrasound-guided sclerotherapy is an office-based minimally-invasive procedure used to chemically ablate superficial varicose veins as part of a Continuum of Therapy approach remaining after endovenous laser ablation. With ultrasound guidance, an FDA cleared chemical agent, sodium tetradecyl sulfate (STS), is precisely injected into veins targeted for chemical ablation, usually as a foam, to shrink and collapse them. This technique requires precision and expertise. The advantages of ultrasound-guided sclerotherapy are no scarring, effective shrinkage and collapse of chemically ablated varicose veins, and a powerful adjunctive tool for eliminating residual collateral varicose veins remaining after endovenous laser ablation. Complications are minimal in the hands of an experienced Vein Specialist.