system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do intestinal cramps hurt?

If there are no nerve endings in the intestinal tract, why does it hurt so badly when you have gas pains or cramping? And why does a heating pad help?
gpt
There are very many nerve endings all along the intestinal tract. They are different than the sensory and motor nerves of, say, your skin and muscles, but they very much exist. They are called visceral nerves (viscera = guts).