Why Do Fingers and Toes “Prune Up” After Being in Water?

We’ve all experienced the wrinkles that develop after being in water for an extended period of time that makes the skin look like the outside of a prune, but how and why does this happen?

First off, the skin is made of layers. The epidermis is the top layer. Below that is the dermis, where smaller blood vessels, nerves, sweat glands, and hair roots reside, and the…