Nothing dangerous will happen except for that area where the nerve is damaged it will probably hurt but usually it will heal and it will seem like nothing has happened. But if the cells are damaged badly you won't have any feeling in the part of the body where the cells are damaged. Also the cell may not regenerate.
A nerve cell can be injured in many ways. One was is a direct attack on the nerve cell from an external force such as an infection. Another way is when the organism is attacked and the nerve cells are damaged during the attack.
depending on which nerve is damaged almost anything could happen
No-- Nerve cells are one of the few kinds of cells that never regenerate or regrow.
One of two thing can happen (depending on just how damaged). If it is a sensory nerve, that will not carry sensory impulses to the CNS. You may have a numb feeling in a small area or a very large area. If it is a motor nerve, you may not be able to move a muscle (or a group of muscles). That really is paralyzed means.
When a nerve supply is destroyed or badly damaged in a muscle it can cause the muscle to not feel any touch. This can lead to further damage.
Loss of both motor and sensory function
Yes this can happen when any nerve is damaged but this is a greater danger if its an actual Spinal Nerve.
some may cause diseases
The end organ or muscle innervated by that particular spinal nerve component would atrophy.
Nothing serious will happen right away but it will begin to hurt a bit. Later on, it will begin to heal. If it is really seriously damaged then the cell may not regenerate. To be presice you might die.
Divide by zero.
they die