Swimming and Skin: Managing Chlorine Damage

Chlorine is added to pools as a disinfectant and it works — but at the cost of being mildly disruptive to skin and hair. For occasional swimmers the effect is minor. For people swimming daily or multiple times a week, cumulative barrier disruption is real and worth managing actively.

What chlorine does

• Strips oils — chlorine is a mild oxidiser that breaks down sebum and lipids on the skin surface.
• Disrupts the acid mantle — pool water is typically slightly alkaline (pH 7.2–7.8), and the skin's acid mantle is pH 4.5–5.5. Repeated alkali exposure disrupts barrier function.
• Can cause or worsen eczema — prolonged exposure without post-swim care is a known eczema trigger.
• Reacts with organic matter (sweat, urine) to form chloramines — which cause more irritation than chlorine alone.

The pre-swim barrier

Applying a thin layer of a simple emollient or barrier cream before entering the pool creates a partial physical buffer. This is more protective than showering before (though you should shower to reduce chloramine formation — it is courteous and required by most pools).

The post-swim routine

• Shower within minutes of leaving the pool — do not let chlorinated water sit on your skin.
• Use a gentle, slightly acidic cleanser to help restore the acid mantle (look for pH 5.0–5.5).
• Moisturise immediately after showering while skin is still slightly damp, to lock in hydration.
• Use a ceramide-containing moisturiser if you swim frequently — this is one of the clearest use cases for ceramide supplementation.