Electrocoagulation is sometimes called diathermy electrolysis. This procedure works by the passage of electric current through the skin using a needle that causes heat to be generated. This heat produced by the current destroys the blood vessel. It is worth noting that although other vessels can form, the ones that are treated with electrolysis will never re-emerge again. There is no need for anesthesia with this procedure, and results are instant. Vessels generally treated by this method are too small to be treated with sclerotherapy. Your surgeon will help you decide which method is best for your particular problem.