Sclerotherapy or “injection therapy”, is the most common treatment for spider veins on the legs. During treatment, a mild chemical solution is injected into the spider veins. The chemical solution irritates the walls of the spider veins, causing them to collapse. The body then reabsorbs the vein and blood is re-routed to a healthy vein, restoring proper venous circulation in the area. The spider veins then disappear in the treated area. It can take a few treatments to get rid of all the veins in an area depending upon the size of the area and the number of spider veins involved. There is no downtime with sclerotherapy and patients can immediately resume their daily activities.