I too was recently diagnosed with a large assist in the sacral area. After another neurosurgeon and multiple pain. Doctors missed it for years. I have multiple autoimmune issues, including interstitial cystitis which I now think was a misdiagnosis because the cyst can cause bladder pain. I even have an interim device to help with that pain. But nothing touches the chronic pain that I am experiencing with this cyst, especially at night, throbbing, no asleep. I’ve taken ibuprofen, I’ve rubbed CBD oil 1200 mg, I’ve done lidocaine patches, I’ve done muscle relaxers, I’ve done sleeping AIDS from a doctor, Nothing is helping, and I am so desperate for some relief. I’m very happy to find this for him and speak with others who have also been diagnosed and what you are doing.