My sunscreen washes off in the pool. What actually holds up?
Nothing holds up indefinitely. The American Academy of Dermatology recommends a broad-spectrum, water-resistant sunscreen of SPF 30 or higher, reapplied every two hours and again immediately after swimming or sweating. No sunscreen is labeled waterproof. Evidence
Why this matters
- Reasonably supported
I checked what "water resistant" means on a label. It is a tested claim, not a promise the product never comes off. The AAD treats reapplying after you get out of the water, or after a sweaty match or practice, as the normal routine, not an exception.
Considerations
- Depends on you
This is general sun-protection guidance for any reader, not written for vitiligo or for skin that has lost pigment specifically. It does not give a fixed number of minutes a "water resistant" label is good for; that detail lives on the product's own packaging.
Questions for your dermatologist
Is there a sunscreen texture or format you would recommend for the patches on my skin during sport?
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Can playing sport itself - not an injury, just the ordinary friction - start a new patch?
People I have heard from ask first whether their vitiligo will keep spreading. I read the international classification consensus, and it says the evidence for that link is lacking. It groups sport with washing, dressing, personal care, other occupational activity and pressure from clothing as everyday friction the evidence does not currently tie to new patches. Evidence
Why this matters
- Limited evidence
I cite the same consensus document on /vitiligo/will-it-spread. That page answers a related, different question: whether an actual injury, like a cut, a scrape, or a burn, can start a new patch there.
Considerations
- Depends on you
"Evidence is lacking" is not the same as "ruled out." The consensus does not report having tested this directly; it reports the absence of good data either way. It also does not cover a specific injury sustained during sport, which is a different, better-documented question - see /vitiligo/will-it-spread for that one.
Questions for your dermatologist
Have you seen a pattern in my own skin around sport or exercise?
Saving keeps this on your device and needs JavaScript, which is off in this browser.If I get an actual injury while playing, is there a step you want me to take differently?
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Evidence detail: what's sourced here, and what's pointed elsewhere
I source two claims directly here. Three related questions sit on their own pages, which already carry them, so I link rather than answer them twice.
- What is supported
- The AAD's general guidance on water-resistant sunscreen and reapplying after swimming or sweating. The vitiligo classification consensus's statement that evidence is lacking for linking everyday friction, including sport, to new patches.
- What is deliberately not restated
- Three things. General sun protection with clothing, hats and sunscreen. Whether an actual skin injury during sport, such as a cut, a scrape, or a burn, can start a new patch, and what the evidence on that says. How camouflage makeup or self-tanner holds up against water. All three are already sourced claims on their own pages. I link to them instead of repeating them.
- What remains unmeasured
- No source I have read measures whether chlorine or other pool chemicals affect skin that has lost pigment. None measures whether sweat changes how a topical vitiligo treatment works. I state neither, because I have found no source that establishes either one.
Evidence behind this page
Sources
Each evidence badge opens the source and its limits. The full list stays available here.
- American Academy of DermatologyPatient education · Regulatory / guideline, tier 1Independent source
- Published
- SteadySkin last checked
What this source can and cannot tell you
Why the independence label says this: US specialty medical association public-education page; no product or manufacturer tie.
What this source supports
Supports choosing a broad-spectrum sunscreen of SPF 30 or higher that is water resistant, and reapplying it every two hours and immediately after swimming or sweating.
What it does not support
Is general sun-protection guidance for any reader, not specific to vitiligo or to skin that has lost pigment. It does not state a fixed time limit, such as 40 or 80 minutes, for what "water resistant" means. It does not use or define the word "waterproof" - no sunscreen is labeled that way.
Claim-specific review for this source is still in progress. Only the source-level evidence and limits are shown here.
- Pigment Cell & Melanoma Research (Ezzedine K, et al.)Guideline · Regulatory / guideline, tier 1Independent source
- Published
- SteadySkin last checked
What this source can and cannot tell you
What this source supports
Supports separating segmental vitiligo from nonsegmental forms and recognizing mixed and initially unclassified presentations. Classification is a clinical and longitudinal judgment. Its section on the Koebner phenomenon supports defining that phenomenon as patches developing at sites of previously unaffected skin that was specifically injured. It endorses the Vitiligo European Task Force classification of that phenomenon into history-based, clinical-observation-based and experimentally induced forms. Its section on mucosal vitiligo defines that term as the oral or genital mucosae. Where the patches are at one site alone, and especially a genital one, that section says a differential diagnosis of lichen sclerosus should be addressed by biopsy. It records that genital lichen sclerosus and vitiligo have been reported together.
What it does not support
It does not support self-classification from symmetry, one patch or a photograph, and it does not predict an individual response. On the Koebner phenomenon it records a general impression that the phenomenon and disease stability are related, then states that objective data are lacking. It also says scientific evidence is lacking for attributing vitiligo to daily friction from washing, dressing, personal care, sports, occupational activity or pressure from clothing. On lichen sclerosus it cites one reference from 2000 and calls a link a possibility, not a finding. It counts nothing and gives no rate.
Claim-specific review for this source is still in progress. Only the source-level evidence and limits are shown here.