TL;DR
Daily chlorine exposure strips the skin’s lipid layer faster than almost any other common environment. Pre-pool, soak in clean tap water and apply a thin barrier of oil or balm. Post-pool, neutralize before you moisturize. Vitamin C body wash is genuinely useful here. A ceramide-rich body moisturizer twice daily. Pool every day, recover every day.
The swimmers I have met who have the worst skin all share one habit: they shower after practice with hot water and the locker room soap dispenser, then dry off, dress, and leave. By month three of training the elbows look ashy, the chest is dotted with tiny acne mechanica, and the cheeks have a slight green tint that does not fully wash off.
The fix is not a fancier moisturizer. It is sequencing.
Why this matters
Pool chlorine is sodium hypochlorite or chlorine gas dissolved in water at 1 to 3 parts per million. It oxidizes the lipid bilayer that makes up the skin barrier and removes natural moisturizing factor from the stratum corneum. Daily exposure means daily lipid loss, which means a skin barrier that never gets a chance to fully repair.
The visible signs (dryness, dullness, hair that turns brassy or green, eczema flares) are downstream of a chemistry problem. Most swimmer skincare advice ignores the chemistry entirely.
The pre and post protocol
Pre-pool, ten minutes before you get in: shower in clean tap water. Wet skin and hair absorb less chlorinated water than dry skin and hair. Apply a thin layer of jojoba oil or a body balm to areas that chafe (chest, inner thighs, shoulder straps). Skip silicone-heavy formulas; they trap chlorine residue against skin.
Pool exit, within five minutes: shower again. Cool to lukewarm water, not hot. A vitamin C body wash. Vitamin C reduces chlorine residue chemically (ascorbic acid neutralizes hypochlorite). It is a small effect but consistent. Some swim clubs install ascorbic acid showers for this reason. Read our brightening comparison for the difference between body and face uses.
For face: a low pH gel cleanser, pat dry, BioCell Renewal Cream or another ceramide-rich moisturizer while skin is still damp. For body: ceramide body lotion or a thicker barrier cream on elbows, knees, ankles.
Evening, regardless: another moisturizer pass before bed. The skin barrier rebuilds overnight.
Common mistake
Skipping the pre-shower. Diving straight into the pool with dry skin maximizes chlorine absorption. The pre-shower is a five-minute step that probably matters more than any post-pool product. Most coaches do not teach it.
The contrarian point: a lot of competitive swimmers think they should exfoliate aggressively to remove pool residue. The opposite. Chlorine has already exfoliated for you. Manual scrubs on top of daily chlorine exposure is the recipe for permanent barrier damage. Once a week is plenty, and only with a gentle chemical exfoliant like mandelic, not a scrub.
Real numbers
A 2019 study in the British Journal of Dermatology looking at competitive swimmers measured a 37% reduction in stratum corneum hydration after a single 90-minute pool session, with full barrier recovery taking up to 48 hours. The swimmers training twice daily never fully recovered between sessions, leading to chronic xerosis and a higher rate of contact dermatitis.
FAQ
Does swim cream actually work? Pre-pool oil barriers reduce chlorine penetration measurably. Marketed swim creams are often just heavier silicone-based body lotions. Petroleum jelly or jojoba oil works.
Should I use sunscreen in outdoor pools? Always. Mineral, water resistant. Reapply after each break. See our daily SPF guide.
What about my hair? Rinse and lightly coat with conditioner pre-swim. Wash with a clarifying shampoo weekly.
Eczema flares from the pool? Common. Pre-shower plus barrier balm plus vitamin C wash plus ceramide moisturizer is the four-step minimum. Eczema routine for the daily framework.
Will I always look this dry? No. Within two weeks of the full protocol, most swimmers see hydration come back.
Browse barrier damage posts for related repair plans.
Sources
Seki T, Morimatsu S, Nagahori H, et al. Effects of chlorinated water on stratum corneum hydration. British Journal of Dermatology, 2019. AAD.org/” rel=”noopener” target=”_blank”>American Academy of Dermatology. Swimmer’s skin care recommendations, 2023.