ত্বকের ব্যারিয়ার আসলে কী

The outermost layer of skin works like a brick wall: cells are the bricks, lipids — ceramides, cholesterol, fatty acids — are the mortar. When the mortar thins, water escapes and irritants get in.

What a compromised barrier feels like

• Products that never stung now sting
• Tightness after cleansing that does not settle
• Redness that lingers
• Flaking alongside oiliness
• Breakouts that appear after adding an active

The usual causes

Over-exfoliation is first by a wide margin. Then harsh cleansers, too many actives at once, very hot water, and long stretches in air conditioning.

How to recover

Take everything out except three things:

1. A gentle cleanser

2. A bland moisturiser with ceramides

3. Sunscreen in the morning

No acids, no retinol, no vitamin C, no scrubs, no clay masks. Two to four weeks. It feels like doing nothing; it is the thing that works.

Reintroducing actives

One product. Twice a week. Two weeks. If skin stays calm, increase slowly. If it stings again, you moved too fast.

Prevention

Exfoliate two or three times a week at most, not daily. Keep one strong active in a routine rather than three. And when in doubt, moisturise — a barrier rarely suffers from too much of a plain cream.