Normally spider veins and less important dilations of the veins are atrophied. In Germany Aethoxysklerol using the agent Lauromacrogol 400 is the only remedy that is permitted for sclerotization. With the injection the inner walls of the veins are irritated and made “sticky” so that the veins close and finally dissolve completely. Even more effective is micro-foam sclerotherapy because Aethoxysklerol is foamed before injection. After the treatment compression of the leg is necessary for a couple of hours. This method is well-tolerated, pigmentation and effusions of blood (haematoma) are rare. When performed properly sclerotherapy is a leading treatment for spider veins.
Alternatively, there is a therapy with long-pulsed NDYAG laser that is a little more expensive. The more delicate the structure of the vessels, the better the results. This method neither needs injections nor pressure bandages but is only applicable for spider veins that have a diameter of up to 3 mm (0.118 inches). The laser light is absorbed by the red blood cells, they swell and the blood vessel closes. Pains can be eased by cool-air treatment.
Varicose veins: Varicose veins: Diagnosis and treatment