my experience with CBD oil on back pain is that it really doesn't help if you have stenosis (L3-L4-L5) like i have. I used to take 2 drops under the tongue and hold it there for 60 -90 seconds and then spit it out. I then did hot water rinses in my mouth and spit, followed by honeys under the tongue for 60 seconds and then spit . i did these rinses twice, because my stomach will be disturbed by the oil in it. The CBd oil did help with all my other joints somewhat. I also have temple and forehead headaches because of trigeminal neuralgia. CBD oil does nothing for that. My nephew uses medical marijuana for his failed lower back operation, which contains some THC and it does really alleviate his pain. I have had cortisone shots in my lower back which had helped previously. i need to get another set of these. Usually three shots (1 every 3 weeks) will help tremendously. When your pain specialist injects have him/her inject very slowly and ask you as he is doing this how are you feeling. If injected too fast, you run the risk of tremendous back pressure for a short period of time as well as the possibility of an epidural induced headache which will last for a whole day. The injection should be done with a flouroscope so the surgeon can see where it goes into the joint, otherwise he/she may hit the epidural fluid and thus the horrible headache. I was told by a chiropracter that if you rub the CBD oil around the areas of the headache (keep away from the eyes) it should help the head pain. Have you had an MRI of your neck? My neck MRI indicates so much arthritis and disc misalignment that it can't be operated on. good luck and best wishes.......kozlo52