Question

why do the skin of our finger shrink when we wash cloth for a long time?

Answer 1

Our skin of finger shrinks when we do the same, as when we wash the clothes the water around the fingers or hand behaves like hypertonic solution and water starts coming out from finger(cell) to out side region causing the fingers to shrink.

Answer 2

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When we wash clothes, our hands are exposed to water for a long time. Our hands behave as a hypertonic solution and the outside of our hands behave as a hypotonic solution. ... So actually the water is not absorbed here just leaving and thus it shrinks.