Is sclerotherapy safe for everyone with varicose and spider veins?
Sclerotherapy is generally safe for most people for treatment of varicose veins and spider veins. However, in certain groups of people, sclerotherapy needs to be avoided, including non-ambulatory people (those unable to walk). Other contraindications for sclerotherapy include obesity, blood clots in the deeper veins, allergy to the sclerosing agent, pregnancy, and arterial obstruction (blocked blood flow in the artery near the varicose vein).