How Sclerotherapy Works
After the area is examined, the skin is disinfected and a fine needle is used to inject the prescribed sclerosant directly into the selected vein. Cooling may be used to improve comfort. The medicine causes a controlled reaction in the vessel wall so the vein collapses and seals.
Closing a small superficial vein does not stop normal circulation. Blood reroutes through other healthy vessels, and the treated vein is gradually broken down by the body. The visible vein may fade over several weeks, although some vessels take longer.
One treatment cannot be guaranteed to clear every vessel. The number of sessions depends on the number, size and response of the veins, and a course of treatments may be recommended.

