Everything used to be fine. Now your moisturiser stings, your face is tight an hour after you wash it, and there is a patch on your cheek that will not calm down.
The instinct is to buy something. The fix is almost always to stop.
What the barrier actually is
The top layer of your skin is a wall. Cells are the bricks, and a mix of fats holds them together as mortar. Ceramides make up about half of that mortar.
The wall does two jobs. It keeps water in and it keeps irritants out. When it thins, water leaves faster than your skin can replace it, and things that never bothered you start to.
How you know
- Products that were fine last month now sting or burn on application.
- Tightness that a moisturiser does not fix, or fixes for twenty minutes.
- Redness that lasts longer than a day or two.
- Flaking on skin that also feels oily.
- New sensitivity to fragrance, to wind, to hot water.
Rough patches and a dull, papery look often come with it.
What did it
Rarely one thing. Usually several at once.
Exfoliating too often is the most common. An acid toner every night plus a scrub at the weekend is a lot of wall taken down and not much time to rebuild.
Starting a whole routine on the same day is the second. Six new products at once, and skin that has met none of them.
Hot water and rough towels. Small, daily, and they add up over a winter.
Stacking actives. A retinoid, an acid and a strong vitamin C in the same week is a lot to ask of anyone's face.
The repair, which is mostly subtraction
Stop every active. All of them. Acids, retinoids, strong vitamin C, scrubs, cleansing brushes. Nothing for two weeks.
Keep three things:
- A gentle cleanser, lukewarm water, once at night. Water alone in the morning is fine.
- A plain moisturiser, applied to damp skin, morning and night. Ceramides help. So does glycerin. Niacinamide is worth having in there, because it prompts skin to make more of its own ceramides over a few weeks.
- Sunscreen every morning. A compromised barrier is a worse barrier against ultraviolet too.
That is the entire routine. It will feel like doing nothing. Doing nothing is the treatment.
How long
Mild irritation settles in one to two weeks. A barrier that has been over-worked for months takes four to six.
Consistency matters more than any single product here. Two weeks of plain moisturiser beats one week of an expensive one and a return to acids on day eight.
Coming back afterwards
One active. Twice a week. For two weeks. Then, if nothing stings, three times a week.
Add the second active only once the first has been comfortable for a month. It is slow. It is also the last time you will have to do this.
When it is a doctor's job
If it has not improved after four weeks of gentle care, or if there is oozing, warmth, spreading, or real pain, stop guessing and see a dermatologist or your GP. Eczema and dermatitis look like this and need something a shop cannot sell you.