Varicose veins is a very common problem all over the world. Surgery has been the gold standard treatment for many years, however now other less invasive options are available and sometimes more efficient. The aim of this study was to present the technical aspect of the DGFS, and evaluate its efficiency in the management of GSV varicosities. In this prospective study, 45 patients presenting to Kasr el Aini hospital with Great saphenous vein varicosities were treated by DGFS on outpatient basis. Foam was generated by the Tessari method using Policonadol 3% as sclerosent material. One week, and 6 months post intervention follow up using clinical examination and duplex scanning was used to asses outcome and detect complications. After 6 months period all the patients showed clinical improvement evident by significant improvement of the venous severity score. On duplex scanning 89% of the patients showed complete obliteration of the GSV and 11 % showed partial occlusion with no evidence of reflux. However 18% of patients needed reinjection during this period for one or more times to achieve this result. No major complications were detected in this study however 20% of patients had some skin pigmentation and only 1 patient (2%) had thrombophlebitis and another one had DVT.