My first injections were starting to fade after a year and half. The Dr did a wonderful job. I went back for another round about a week ago. Original Dr was on maternity leave so a young new doctor filling in did the shot. He didn't use guided ultrasound to pinpoint the spot and used blind injection. I don't think he had experience with ACNES injections, He went in from an angle instead directly over nerve, which meant I was really hurting afterwards. This is causing abdominal wall pains. I hope he got lucky and helped and not harmed. About a week will tell the tale. Make sure pain management has ACNES experience and good luck.