Spider veins and small veins that are not causing more serious problems.
Smaller varicose veins that come back after vein-stripping surgery.
Larger varicose veins, when newer techniques are used.
Sclerotherapy uses an injection of a medication into a varicose vein to damage and scar the inside lining of the vein. This causes the vein to close.
During this procedure, the affected leg is elevated to drain blood, and the sclerosant is injected into the varicose vein. The procedure is done in a doctor's office or clinic and takes 5 to 30 minutes, depending on how many varicose veins are treated and how big they are.
After the injection of sclerosant is given, pressure is applied over the veins to prevent blood return when you stand up. You may need to wear compression stockings or elastic bandages for several days or weeks to maintain the pressure.
The sclerotherapy injection may be painful, and the chemical (sclerosant) that is injected can cause a feeling of burning or cramping for a few minutes in the area where the shot was given. You may need repeated sessions and many injections per session depending on the extent of the varicose veins and type of sclerosant used.