What is Sclerotherapy? Sclerotherapy is a non-surgical procedure that helps to treats varicose and spider veins by injecting chemicals, known as sclerosing agents directly into the affected vein. The damaged vein is reabsorbed and eventually fades, leaving a clear area of skin. It is sometimes called microsclerotherapy, but this is usually reserved for the spider or thread veins.   How does it work? The first stage of the procedure involves cleaning the skin around the targeted veins; then with a fine needle, injecting the chemical solution directly into it. The FDA has approved two solutions to date, these are: Sodium…