Have you ever noticed when you are under water for a long time, your finger tips turn white and their skin is not as smooth as before and they change. But after a while they go back to their previous shape. I wanna know how to refer to that shape of skin. Hope I'm clear enough.
Most people would call that sort of thing wrinkled or maybe pruned, perhaps even corrugated if they were particularly prone to long words.
The wrinkles that occur in skin after prolonged exposure to water are sometimes referred to as pruney fingers or water aging. This is a temporary skin condition where the skin on the palms of the hand or feet becomes wrinkly. This wrinkling response may have imparted an evolutionary benefit by providing improved traction in wet conditions, and a better grasp of wet objects.
It's called (water immersion) wrinkling.