Background:Failed Back Surgery Syndrome refers to patients with sustained pain post spinal surgery for back pain. Racz and colleagues described the technique which involves epidurography, adhesiolysis, and injection of hyaluronidase, 10% sodium chloride and bupivacaine on day 1. The technique of Radiofrequency ablation uses high-frequency current which produce tissue coagulation due to heat. The procedure used radio wave, applied through a percutaneous probe which generate thermal lesion in the nerve.Patients and methods :This study was conducted on 60 Failed Back Surgery Syndrome patients classified into two groups each of 30 patients. FBSS treated by Racz technique (group I) and the other group (II) treated by Racz plus radiofrequency. Results: VAS score and Oswestry score used to assess both techniques daily for a week then weekly for a month, then monthly for 6 months, we found that both techniques showed statistically nonsignificant difference before the procedure, but showed a statistically highly significant difference between both groups after the techniques. There is a reduction of VAS score from a mean of 6.2 to 3.87 in group (I) and a reduction from 6.03 to 2.7 in group (II). There is a reduction of Oswestry score from a mean of 57.2 to 40.6 in group (I) and a reduction from 57.03 to 32.47 in group (II).Conclusion:Using radiofrequency with Racz catheter adhesolysis gives better results than using Racz catheter alone in cases with failed back surgery syndrome.