Question

why does the skin of your finger shrink when you wash clothes for a longh time

Answer 1

may be because of osmosis .solutions is hypertonic so movement of water from cell to outside

Answer 2

The soap water outside has less water concentration than inside our skin. The water outside is thus a hypertonic solution. As water moves from high to low concentration, the water will move from our skin to the soap water. This is why our finger skin wrinkles.