Can nerves cause sparks?

Nerves can produce a "shock" sensation but this has nothing to do with actual electricity. Electric shocks feel that way because nerves suddenly become uncharacteristically and excessively activated. So if nerves are activated in a similar way, the sensation will be similar to that of an electric shock. read more

a visible spark is very high voltage and some current . that is far more than any nerve can produce BUT Yes the nervous system is electrical and chemical and the feeling of a "shock" is in the nerves. read more

High blood pressure medicine can cause neuropathy by decreasing blood flow at the extremities, like the feet or hands. In order to survive in this oxygen depleted environment, the nerve cells can temporarily shrink (atrophy) in order to present a smaller surface to the world and stay alive. read more