I tried HBOT a few years ago. It was supposed to be a 5 day a week, several week series. It was very expensive & I had to pay out of pocket bc insurance would not pay since HBOT is not FDA approved for RSD. I had to go to a private office to have it done bc most places wouldnt even do it since it wasnt FDA approved. I was very excited to try it. Unfortunately, I only went to 3 sessions. It made me sooo much worse. I just couldnt tolerate it. Hope this info helps!! Good luck to you!!!