@snu injected contrast dye under fluoroscopy to confirm they were in the bursa. Then local anesthetic, then cortisone. The cause is from too much sitting and the ischial bursa becoming inflamed. The injections are becoming more effecand last longer each time but remember, the inflammation was going on for a long time so its going to take a bit for the cortisone to completely resolve the inflammation. The local anesthetic takes away the pain completely for a few hours. Thats confirming they definitely hit the right spot. Its magical!!! Good luck.