A pinched nerve, carpel tunnel, maybe an aneurysm. If you have sharp pains in your spine, see a chiropractor.
Spine
Spine or Thorn
They have a spine
No, they are invertabrate animals.
yes, their dorsal and pectoral fins have a sharp spine that can cut you
You may have pulled a muscle or hurt it somehow
Asritis
The sharp slender process in a human bone is known as a spinous process, also called a neural spine. It is a bony projection that extends off the posterior side of the vertebra, serving as an attachment point for muscles and ligaments.
When feeling a cat's spine, you should be able to feel the individual vertebrae but they should not be protruding or overly prominent. A healthy cat's spine should feel firm and well-covered by muscle and skin. If the spine feels bony or sharp, it could indicate that the cat is underweight or malnourished.
I'm not sure but see a dr !!
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.