Why does you skin wrinkle up if you spend to much time in a warth bath?

When you spend too much time in a warm bath, your skin wrinkles due to a process called osmosis. The warm water causes the outer layer of skin to lose moisture, leading to a temporary change in the skin's structure. This wrinkling may help improve grip in wet conditions, as the skin's surface area increases. Once you leave the bath and the skin rehydrates, the wrinkles typically disappear.