Most complications following treatment for varicose veins are minor.
The side effect of surgery under anesthesia may include nausea, vomiting and a slight risk of infection in the incision. While all incisions leave scars, the scars resulting from the vein-hook crochet technique usually are minimal. Surgery may cause bruises and areas of hardening near the scars in the operated leg. The side effects of sclerotherapy depend on the type and strength of the solution used, the size and location of the veins treated, and the doctor's experience. Some sclerosing agents have been associated with allergic reactions that could be severe.