Dehydrated skin lacks water. The surface cells are deflated and no longer plump, perhaps giving your skin a dull, tired look. Your skin doesn’t seem flaky but just lacks luster. Dehydrated skin can be experienced by all skin types — including oily skin.
There are times when skin's oiliness is exacerbated by dehydration, so oil glands willover-produce. This is your skin's way to ensure hydration, but it can cause breakouts. (And no one wants that.)