You apply your normal skincare and it burns. Your skin feels tight, looks red, and reacts sensitively to everything. Don't panic — this isn't permanent. It's most likely a compromised skin barrier. And the good news: it can be repaired.
In this guide, we explain the biology of the skin barrier and give you a science-based repair strategy.
The skin barrier (stratum corneum) is the outermost layer of the epidermis — your first line of defence against the outside world. When compromised, you'll notice:
If more than two of these apply to you, your barrier is likely compromised.
Think of your skin barrier as a brick wall:
When the "mortar" breaks down, the wall loses its integrity. Water escapes (transepidermal water loss, TEWL), and irritants enter.
| Component | Function | Optimal Ratio | |-----------|----------|---------------| | Ceramides | Structural integrity, water retention | 50% of lipids | | Cholesterol | Fluidity and barrier stability | 25% of lipids | | Free Fatty Acids | pH regulation, antimicrobial | 15% of lipids | | Cholesterol esters | Reservoir | 10% of lipids | | NMF (Natural Moisturising Factor) | Hydration | Within corneocytes | | Filaggrin | NMF production | Breaks down into NMF |
The #1 cause. Using AHAs, BHAs, scrubs, or retinoids too frequently strips the barrier faster than it can repair itself.
Sodium lauryl sulphate (SLS) and high-pH cleansers dissolve the lipid matrix. Use pH-balanced (5.0–6.0) syndet or amino acid-based cleansers.
Stop immediately:
Keep only:
Apply these key ingredients:
| Ingredient | Why | Product Examples | |-----------|-----|------------------| | Ceramides | Rebuild the lipid matrix | CeraVe Moisturising Cream, Dr Jart+ Ceramidin | | Niacinamide 2–5% | Increases ceramide production | Paula's Choice 10% Niacinamide | | Panthenol (Pro-Vitamin B5) | Soothes and accelerates healing | La Roche-Posay Cicaplast Baume | | Centella Asiatica | Anti-inflammatory, wound healing | COSRX Snail 96 Mucin Essence | | Hyaluronic Acid | Hydration (apply to damp skin) | The Ordinary Hyaluronic Acid 2% | | Allantoin | Keratolytic, soothing | Avène Cicalfate+ | | Glycerin | Humectant, draws in moisture | Any basic moisturiser |
Once your skin no longer burns or stings:
| Severity | Timeline | |----------|----------| | Mild (slight tightness) | 3–5 days | | Moderate (redness, stinging) | 1–2 weeks | | Severe (burning, flaking, severe redness) | 2–6 weeks | | Chronic conditions (eczema, rosacea) | Ongoing management |
Yes, but apply it to damp skin and always follow with an occlusive moisturiser. HA on dry skin in dry climates can actually increase TEWL.
Yes. Petrolatum is the gold-standard occlusive, reducing TEWL by 99%. Apply a thin layer over your moisturiser at night.
Ideally, minimise makeup. If needed, choose non-comedogenic, mineral-based formulas and remove gently with an oil cleanser.
If symptoms persist beyond 4 weeks despite the repair protocol, or if you experience severe burning, oozing, or spreading rash, consult a dermatologist.
Sources: Journal of Investigative Dermatology, British Journal of Dermatology, Skin Pharmacology and Physiology, International Journal of Molecular Sciences.
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