Why does our skin change color when we apply pressure or stretch it? Like if I press the tips of my fingers together they go from reddish to pale white.

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What’s the biology behind this?

In: Biology

Your skin is reddish because of blood. If there was no blood then your skin appears very pale. When you apply pressure you are temporarily forcing blood out of the blood vessels in that spot.

When you press down on the skin, you are restricting the blood flow through that area. When this happen, it loses the reddish color and turns lighter than when it is blood-filled