It is good to keep your body, including your skin, hydrated, however the outermost layer of skin does not absorb water since it is made up of dead skin cells.

这是很好的保持你的身体，包括你的皮肤，滋润，但最外层的皮肤不吸收水分，因为它是由细胞组成的死皮。

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The slightest motion of a patient in bed creates friction between skin and sheets and results in loss of cells from the skin's outermost layer.

卧床病人最轻微的活动就会在皮肤和床单之间产生摩擦力，结果就会引起皮肤最外层脱落。

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Removing the dead cells on the outermost layer of the skin on a regular basis lets the skin underneath regenerate itself.

在定期去除皮肤表层死细胞的基础上让底层的皮肤再生。

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This causes an ongoing cycle in which new skin cells move to the outermost layer of skin too quickly in days rather than weeks.

CNN: Psoriasis