Damaged skin barrier: stop, repair, then rebuild

It often starts with good intentions. A BHA for blackheads, a vitamin C for glow, a retinol someone recommended, a peeling toner, maybe a scrub on the weekend. For a few weeks it seems to work. Then one day your usual moisturiser stings, your cheeks look red and shiny, and patches start to flake.

That's a damaged skin barrier, and it is one of the most common skin problems we hear about from people who care a lot about their skin.

What the barrier is

The barrier is the outermost layer of your skin. Think of it as a brick wall: skin cells are the bricks, and the mortar between them is made of fats, mainly ceramides, cholesterol and fatty acids. That wall keeps water in and irritants out.

Acids, retinoids, scrubs and foaming washes all thin the wall or wash out the mortar. One at a time, used sensibly, the skin keeps up. Stacked together, it can't, and water leaks out while everything you put on gets in too easily.

How to tell

• Products you have used for months suddenly sting or burn.
• Skin feels tight after washing, even with a gentle wash.
• Redness, especially on the cheeks and around the nose.
• Flaking or rough patches, sometimes with a shiny, stretched look.
• Small bumps or breakouts that appeared along with all the above.

How it differs from sensitive or dehydrated skin

Sensitive skin reacts easily by nature, often for life. A damaged barrier is something that happened, and it heals. If your skin was calm before you added three new actives, it is almost certainly the barrier. Our sensitive skin guide covers the long-term version.

Dehydrated skin is short of water, and hydrating layers fix it. A damaged barrier is short of the fats that hold water in, so watery serums alone don't stay put. It needs lipids: ceramides and cholesterol. The dehydrated skin guide is the right one if nothing stings.

Step one: stop

This is the hardest part and the most important. Put away every acid (AHA, BHA, PHA), retinol and retinoids, vitamin C, scrubs, peel pads, clay masks and foaming washes. Keep them out until your skin has gone two full weeks without stinging.

Cut the routine down to three or four products. Fewer things touching broken skin means fewer things to react to.

Step two: repair

Cleanse gently, once a day if you can. In the morning, water or a no-rinse cleanser is often enough. Cetaphil Gentle Skin Cleanser can even be wiped off. At night, use a cream cleanser like CeraVe Hydrating Facial Cleanser, which cleans without foam.

Calm with centella and panthenol. Centella asiatica soothes red, irritated skin, and panthenol (vitamin B5) helps it hold water and heal. SKIN1004 Madagascar Centella Ampoule is pure centella. Beauty of Joseon Calming Serum: Green Tea + Panthenol adds panthenol, and Purito Wonder Releaf Centella Serum Unscented is fragrance-free.

Rebuild with ceramides. This is the core of the routine: a cream with ceramides, ideally with cholesterol, to put the mortar back.

• Anua 3 Ceramide Panthenol Moisture Barrier Cream or COSRX Balancium Comfort Ceramide Cream for a lighter feel in the heat.
• CeraVe Moisturizing Cream, Illiyoon Ceramide Ato Concentrate Cream or Dr.Althea 345 Relief Cream for drier skin or winter. Dr.Althea 147 Barrier Cream also works well but contains fragrance, so choose another if fragrance has bothered you before.
• Cetaphil Moisturising Cream is a simple, fragrance-free option with panthenol and niacinamide.

On flaky or raw patches, a thin layer of La Roche-Posay Cicaplast Baume B5+ at night acts like a bandage.

Protect. Damaged skin burns easily and can darken where it was red. A mineral sunscreen with zinc oxide is usually the least likely to sting. SKIN1004 Madagascar Centella Air-Fit Suncream Plus adds centella too.

Step three: rebuild slowly

Once your skin has gone two weeks without stinging, bring back the one active you care about most, two nights a week. Wait two weeks before adding another. Never use two exfoliants on the same night. If the stinging returns, go back to step two for a week.

Most barriers recover in two to four weeks. Deep damage, such as a strong peel gone wrong, can take longer.

When to see a dermatologist

If your skin is weeping, cracked, swollen, very painful, or not improving after four weeks of a simple routine, please see a doctor. Some rashes look like barrier damage and are something else. And steroid creams bought without a prescription, often sold as "fairness" creams, can cause exactly this damage and need a doctor's help to stop safely.

We sell the products named here, so weigh our picks with that in mind. For the order to layer things once you're back to a full routine, see skincare routine order.