Some damaged nerves in the body can regenerate and repair themselves.
However nerves on the spinal cord do not have the same ability to regenerate or repair themselves as do the nerves in other parts of the body.
Nerves in our bodies such as the nerves that connect our limbs and organs to the central nervous system have an astonishing ability to regenerate themselves after injury.
So if you damage those nerves then they can repair themselves overtime.
But it can take a few years after the injury for the nerves to regenerate themselves completely and you get back to normal.