I'm not sure but see a dr !!
A pinched nerve, carpel tunnel, maybe an aneurysm. If you have sharp pains in your spine, see a chiropractor.
Spine
Sharp back pain from falling off of a horse could be a broken tailbone. It could also mean that you threw your spine out of alignment or have a pinched nerve.
Spine or Thorn
They have a spine
Your arrows have too much spine (stiffness). Get new arrows with less spine.
No, they are invertabrate animals.
what is a large smooth ball shaped processd on the end of a long bone called
yes, their dorsal and pectoral fins have a sharp spine that can cut you
Asritis
You may have pulled a muscle or hurt it somehow
You should probably get an MRI and have it reviewed by a spine care specialist. Please see related link below.