Good afternoon Cogito!
I have had a discogram, and was done just prior to my double lumbar fusion surgery. Sedation was used, but I was kept awake, so that I could comfirm the pain in each disk that they tested. There was no or little pain as they started, but when they injected the disk, the pressure buildup caused me to moan a few times.
I have to agree with the rest of the members here, and do not understand why they are doing this test, unless they are getting ready for surgery.
Let us know, what comes out of the meeting with your Dr,
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"Snowflakes are one of nature's most fragile things, but just look at what they can do when they stick together"