Spider veins and varicose veins may also be effectively treated with injection treatments known as sclerotherapy. This treatment involves the injection of a “sclerosing” (hardening) solution into the affected vein that causes it to seal shut and eventually fade away.
The type and strength of the sclerosing agent used will depend on the size and location of the vein. Smaller spider veins generally respond better to a liquid sclerosant, while larger veins can be treated with a foamed solution that produces more coverage inside larger veins. Treatment of larger veins is typically done in combination with ultrasound, to ensure precision during the procedure.
Sclerotherapy injections are administered in the office, using a very fine needle. Anesthesia is not needed and you may return to normal activities immediately following the procedure. Veins typically begin to fade from view within a few weeks. Most patients have multiple spider veins and benefit from a series of treatments.