This is the single most common mix-up in skincare, and it explains why so many people buy a rich, expensive cream and feel let down by it.
The distinction
Dry describes skin that produces relatively little oil. It tends to be a persistent characteristic, and it usually responds well to richer textures and oil-containing formulas.
Dehydrated describes skin that is short of water in its upper layers. It is a temporary state, it can happen to any skin type, and oily skin gets it constantly.
How to tell which you are dealing with
Dehydrated skin typically feels tight while still looking shiny. Fine lines look more pronounced in the morning and settle during the day. Makeup can cling in patches. Skin may feel like it soaks up moisturiser and wants more an hour later.
Genuinely dry skin more often feels rough or flaky, is uncomfortable rather than tight, and is worse in cold, dry air.
They can, of course, happen at the same time. That combination usually feels like tightness with visible flaking.
Why the rich cream disappointed
An occlusive cream is good at slowing water loss. It is not good at putting water in. If skin is dehydrated, sealing an empty layer produces a face that feels coated and still tight underneath.
What tends to help
- For dehydration: a humectant — glycerin or hyaluronic acid are the usual ones — applied to slightly damp skin, then a moisturiser over the top to hold it there. The sealing step is not optional; in dry air, humectants without it can work against you.
- For dryness: richer textures, and ingredients that resemble what skin makes itself — ceramides, fatty acids, cholesterol.
- For both: gentler cleansing, and fewer things that leave skin feeling stripped.
The wider point
Naming the problem correctly changes the shopping list entirely. It is worth a few days of paying attention before deciding which one you have.
