A minimally invasive treatment, sclerotherapy involves injecting a saline solution into the varicose vein. This irritates the vein, causing it to collapse. The body reroutes the blood supply to bypass the damaged vein, which is eventually reabsorbed into the body. 

To begin a typical sclerotherapy procedure, a physician uses a fine needle to inject the salt solution into the vein itself. Any discomfort felt is most often mild and resolves in less than two minutes, though the full procedure may take up to half an hour. This may include injection into multiple veins, depending on the location and size of the affected vessel.

Most patients undergo the procedure in an outpatient setting and can drive themselves home afterward.