Barrier Repair

Barrier repair is a period, not a product. When the skin barrier is damaged — by over-exfoliation, too many actives at once, harsh cleansing, cold weather or a course of retinoids started too fast — it stops holding water and stops keeping irritants out. The result is skin that stings when products go on, looks red and shiny-tight rather than plump, and reacts to things it tolerated a month ago.

Recovery has a fixed shape. Stop every acid, retinoid and vitamin C. Cleanse once a day with something non-foaming. Apply humectants onto damp skin, then a moisturiser carrying the lipids the barrier is made of — ceramides, cholesterol and fatty acids — and an occlusive on top if the skin is cracking. Sunscreen stays, because UV damage compounds everything else.

Give it two to four weeks. The stinging usually settles first, then the redness, then tolerance returns. Reintroduce one active at a time, at a lower frequency than before, and treat a return of stinging as information rather than as something to push through.

The trap is impatience: adding a soothing serum while keeping the exfoliant that caused the problem is not barrier repair, it is barrier damage with a cushion.