patients with non cancer coccydynia in this group will receive conventional radiofrequency on ganglion impar

patients in this group will receive alcohol neurolysis on ganglion impar

The entry site was detected under fluoroscopy then local anesthesia was given using lidocaine 2% followed by the insertion of a radiofrequency cannulas (STRYKER 20 G, 9 cm with 1 cm active tip) targeting the junction between the coccygeal bones and pass through it anteriorly in the lateral view. Finally confirming the proper site with a contrast dye in lateral and A-P views.

10 ml of lidocaine 1 % was injected to tolerate the ablation then in the 1st group placing of the radiofrequency cable followed by ablation will be done at 80 degrees for 90 seconds.

patients will be asked to describe their pain on Numeric pain scale ( an 11 numbers scale where 0 describes no pain and 10 describes the worst pain ) and compare it to before the procedure

patients will be asked to describe their pain on Numeric pain scale and compare it to before the procedure

one-item questionnaire that asks patients to rate their overall improvement after a treatment.he scale typically includes ratings such as "very much improved," "much improved," "minimally improved," "unchanged," or "worse".