I ruptured a disk in my back and they wanted a myelogram to see how
extensive the damage was and exactly which way it had ruptured. It’s
amazing how much they can tell! I had surgery to remove the disk stuff
and repair the damage the very next day. Doing fine from that now.
All it is is a radioactive dye that really shows up on x-rays. They
injected directly into the spinal column (kind of like a spinal tap).
It felt cold, but didn’t hurt.
Best of luck.
Donna