Sclerotherapy is a procedure used to treat varicose and spider veins. The unwanted veins are injected with a sclerosant solution through a very fine needle which causes the veins to eventually collapse and become absorbed into the bloodstream.
Sclerotherapy is performed with the aid of ultrasound to ensure precise results. Anesthesia is not needed for sclerotherapy, during which patients experience only a mild burning sensation. The number of injections per session varies based on the number and length of the unwanted veins.