The article analyzes the causes of relapses of varicose veins of lower extremities in 60 patients: in 38 patients after preceding surgery and in 22 patients after phlebo-sclerosing treatment. Of 60 patients 52 were operated upon. The operation in case of recurrence of the disease after surgery must include careful revision of the sapheno-femoral anastomosis, removal of the remaining trunks and segments of veins, detection and ligation of communicating veins with deficient valves.