what is the solution used in sclerotherapy for treatment of spider veins and what happens to it?

Answer 1

It is a highly concentrated sodium chloride (NaCl) solution. The doctor used an extremely small needle (like a 30g) to inject it just below the skin surface into the vessel. The strong saline solution basically dissolves/collapses or obliterates the superficial vein. It will turn brown and disappear over a number of days/weeks. You will most likely be instructed to wear "ted-hose" (support stockings) for a few weeks and to avaoid direct sunlight to minimize scarring. Sclerotherapy takes multiple office visits or treatments to see good results. So be patient.

Answer 2

It is a concentrated NaCl solution. It will be injected thorough the veins.