Why is the skin on palms of your hands wrinkled?

The skin on the palms of your hands is wrinkled because of the blood vessels that run through it. When you hold your hands underwater for a long time, the water molecules cause the skin to swell. This swelling puts pressure on the blood vessels, which causes them to narrow. The narrower the blood vessels, the less oxygen and nutrients can get to the skin. This lack of oxygen and nutrients causes the skin to wrinkle.

When you take your hands out of the water, the skin will gradually go back to normal. This is because the water molecules will evaporate and the swelling will go down. The blood vessels will then widen again and the skin will receive the oxygen and nutrients it needs to function properly.

The wrinkling of the skin on your palms is a natural response to being exposed to water. It is a way to protect the skin from damage. The wrinkles help to keep the water from seeping into the skin and causing it to become too soft and weak.