pruney

Pruney is a term used to describe the wrinkled appearance of skin, most commonly the fingertips and toes, after prolonged exposure to water. This phenomenon is thought to be a physiological response, though its exact purpose is still a subject of scientific research. The wrinkles are created by the autonomic nervous system causing blood vessels in the extremities to constrict, leading to a decrease in volume in the skin of the fingers and toes. This causes the skin to pucker and fold.

The effect is more pronounced in water than in other liquids, and it is not observed in people who have nerve damage in their extremities, suggesting a neurological component. While once believed to be a simple result of the skin absorbing water and swelling, the current understanding points to an active process mediated by the nervous system. Studies have shown that this "pruney" effect can improve grip on wet objects, potentially aiding in tasks like picking up slippery items. This suggests an evolutionary advantage, allowing our ancestors to better manipulate objects in wet environments. The duration and intensity of the "pruney" effect can vary between individuals and is generally considered a temporary and harmless occurrence.