Sclerotherapy is a procedure used to treat unwanted blood vessels such as spider veins and varicose veins. Spider veins are dilated small blood vessels with a red or bluish color that can cover areas of the skin and become noticeable. Sclerotherapy irritates the lining of the vessels, which causes them to swell and stick together. This can cause the blood to clot, which then becomes scar tissue, which fades away. Most patients can expect a 50 to 90 percent improvement, however, fading is gradual. Disappearance of spider veins normally occurs with this procedure, but similar veins may emerge in the same general area.

Sclerotherapy can enhance your appearance and your self confidence, but it is unlikely that every affected vein will disappear completely as a result of treatment. After each sclerotherapy session, the veins begin to look lighter. Two or more sessions are usually required to achieve optimal results. It should be noted that the procedure treats only those veins that are currently visible. It does not permanently change the venous system or prevent the appearance of new veins in the future. Before you decide to have sclerotherapy, think carefully about your expectations and discuss them with your doctor.