Problem
Why Your Eyes Burn or Skin Itches After Pool Use
Updated 2026-05-22
Pool eyes and itchy skin get blamed on chlorine. Chlorine is the symptom, not the cause. The two real causes are pH out of range and high combined chlorine. Both are fixable in a day.
Why it happens
pH out of range (below 7.0 or above 8.0)
Human tear film and skin sit around pH 7.4. Pool water that drifts above 8.0 or below 7.0 irritates anywhere it touches. Most pool stings come from high pH.
High combined chlorine
Chloramines irritate the same way chemical fumes do. They are not killing pathogens, just sitting in the water and on swimmers.
Old or expired stabilizer
CYA above 100 ppm reduces chlorine's effectiveness and lets chloramines accumulate even when free chlorine reads fine on a strip.
How to fix it
Test pH first
Target 7.2 to 7.6. If above 7.8 add sodium bisulfate per a calculator. If below 7.0 add soda ash.
Shock if combined chlorine is above 0.5 ppm
Standard Cal-Hypo dose, brush, 8 hour pump run.
Check CYA
Above 80 ppm is too high. Partial drain and refill is the only real fix.
Get an exact reading first
Scan your test strip with PoolSense and get chemistry + recommended action in seconds.
Get PoolSenseFAQ
Are pool eyes from chlorine itself?
Almost never. Balanced free chlorine at 1 to 3 ppm does not burn. The irritation is from pH or chloramines.
Do swim goggles solve the problem?
They protect eyes for that swim but do not fix the chemistry. Your skin still gets the same exposure.
Why is it worse with younger kids?
Smaller body mass and more time spent with head underwater. Fix the chemistry, not the swimwear.