system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do nerve cells in very muscular/fat people accommodate for the increased surface area of skin?

Are more nerve cells created? What happens? Does touch sensitivity decrease due to reduced density?
gpt
The same way nerves cover increased surface area as we grow from babies to adults, the axons grow. The tension being pulled on the axons as they are stretched to accommodate larger areas actually promotes growth of the axons

Edit: more eli5 explanation.  Nerves are composed of multiple fibers called axons.  An axon is basically like a usb cable communicating between the computer (neuron)  and another device (communicating neuron). Neurons do not usually multiply in number after early development,  however the axon coming off of the neuron has the ability to grow if stimulated to do so. When you get fatter and your skin begins to stretch this also pulls on the axons which will then be simulated to grow.