The aim of this study is to compare the results of concomitant radiofrequency ablation and sclerotherapy for varicose veins versus treatment in two different sessions . 80 patients with lower limb 3-12 mm varicose veins eligible for radiofrequency ablation (RFA) will be recruited for this study and will be randomized by Randlist software into 2 equal groups.The intervention group will be undergone the standard RFA procedure and sclerotherapy of the smaller venous branches at the same session. In the control group sclerotherapy will be deferred for two weeks after the RFA session. In both groups post-procedural ambulation is encouraged and compression stocking applied for 28 days.The following primary outcome measures will be collected by a questionnaire to compare between the two groups: pain, ecchymosis, erythema, hematoma, hyperpigmentation, paresthesias, phlebitis, skin infection, deep vein thrombosis, pulmonary embolism, arterial damage, nerve damage, skin burns. Follow-up of the patients will be continued till 2 month after the last procedure.