How to use this page
A new patch arrives and the search starts. People I have heard from ask first whether it will keep spreading, and how to tell if it is active. You replay the last few weeks and look for the thing you did wrong.
I read what dermatology sources link to new vitiligo patches, and I noted where those same sources stop. Dosing and treatment schedules belong with your care team.
Community ideas are labeled because they vary by person. They are options, not promises about how another person will respond.
Lived experience - varies by person
A new patch with no cause you can name
Some people can point to the week a patch started. Others never find a reason, however closely they look.
A sunburn, a deep scrape, a hard month - some people can name what came first. Others cannot, and the gap can feel like a failure to pay attention.
Neither experience is a verdict on you. A patch with no cause you can trace is a common report, not proof that you missed something.
Injured skin and the Koebner phenomenon
New patches sometimes appear where skin was injured. Dermatologists call that the Koebner phenomenon, also known as the isomorphic response.
I read the 2012 classification consensus, which defines it as patches that develop where previously unaffected skin was specifically injured. The AAD names cuts, scrapes and burns, and the wound a tattoo makes.
The AAD reports that new spots after a tattoo can show up about 10 to 14 days later. Nothing tells you in advance whether your own skin does this.
The name is worth keeping. It is what the research is filed under, and it is what a dermatologist will recognize if you say it out loud.
What everyday friction has not been shown to do
Waistbands, bra straps, shoes and sport come up constantly as suspected causes. The evidence for that is not there.
The same consensus that defines the Koebner phenomenon says scientific evidence is lacking for blaming vitiligo on daily friction. It names washing, dressing, personal care, sport, work activity and pressure from clothing.
That gap matters. A wound is one thing. The ordinary rub of getting dressed is another, and the source does not treat the two the same way.
Saying evidence is lacking is not the same as saying friction was ruled out. It does mean a tight waistband is a thin thing to blame yourself over.
Sources for the facts above: Evidence
Sunburn, tanning, and how much a patch shows
Sun affects vitiligo in two separate ways, and the two are easy to mix up.
The AAD reports that skin which has lost its color can burn readily, and that a bad sunburn can worsen vitiligo. Shade, clothing and labeled sunscreen are the broad options it gives.
Tanning is the second way. The AAD says tanning raises the contrast between your natural color and the light patches, which is what makes vitiligo more noticeable.
So a patch that suddenly stands out after a sunny week may be contrast rather than new pigment loss. Tanning beds and sun lamps are not a safe way around that.
Sources for the facts above: Evidence
Stress, and the other events people report
Stress is the thing people name most often, and the evidence behind it is thinner than its reputation.
I checked the NIAMS page: it lists sunburn, emotional distress and chemical exposure as events that can sometimes trigger vitiligo or make it worse. It counts none of them.
I read a 2020 study of 100 people with vitiligo. It found higher average stress scores than a matched group without it, and no link between stress score and disease activity.
The authors say the design cannot prove cause and effect. A hard year is real. It is still not established as the thing that made a patch appear.
Chemical exposure on the NIAMS list is broad. It names no product, no ingredient and no industry, and a specific name would be a guess.
Lived experience - varies by person
Illness, pregnancy, and other big changes
People often notice a new patch around an illness, a pregnancy, or another change in health.
Noticing the order of two things is not the same as knowing one caused the other. You may also have been looking at your skin more closely during a hard month.
Registered guidance names sunburn, emotional distress and chemical exposure. I found no mention of illness or pregnancy, so timing is where the honest account of those stops.
If pregnancy or planning a family is the setting, I cover reviewing every treatment with both teams in the pregnancy and family planning guide.
What you can actually do
A short list of things worth doing, none of which requires auditing your whole week.
- Protect skin from sunburn, and treat a cut or a scrape the way you normally would. Clean it and cover it.
- Skip tanning, indoors and outdoors. It raises contrast and it burns skin that has lost pigment.
- Note the date a new patch appeared and what came before it. I cover photos worth comparing in the tracking change and photos guide.
- Keep the note short. A rough line when something changes beats a daily log you will come to dread.
Lived experience - varies by person
What is not yours to carry
Vitiligo is an autoimmune condition. A trigger list is a list of what has been reported, not a list of your mistakes.
You did not cause this by being stressed, by wearing the wrong jeans, or by missing a spot with sunscreen. None of those has been shown to start vitiligo.
Some people find the search for a cause more tiring than the patches. Stopping the search is allowed, and it costs you nothing medically.
When a new patch is worth booking a review
A new patch is a reasonable reason to ask for an appointment, even when nothing else has changed.
- Say when the patch appeared, where it is, and what happened in the weeks before it.
- Ask whether what your skin has done lately changes the plan you are on. I cover how that judgement gets made in the will it spread guide.
- Ask whether your type of vitiligo changes what a new patch means. I cover the named types in the types guide, without asking you to sort yourself.
- Ask for the review now rather than waiting for the next scheduled visit, if the change feels fast to you.
Bring to your next visit
You can use these as written or change the words. Saving keeps a question on this device.
A new patch appeared last month - does that change how you would describe my vitiligo right now?
Saving keeps this on your device and needs JavaScript, which is off in this browser.If I get a sunburn or a deep cut, what do you want me to do about it?
Saving keeps this on your device and needs JavaScript, which is off in this browser.Does this new patch change the plan we agreed, or can it wait until my next visit?
Saving keeps this on your device and needs JavaScript, which is off in this browser.
Evidence behind this page
Sources
Each evidence badge opens the source and its limits. The full list stays available 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.
- American Academy of DermatologyPatient education · Patient education, tier 5Independence not established
- Published
- SteadySkin last checked
What this source can and cannot tell you
What this source supports
Supports patient-facing context that skin which has lost its color can burn readily and that shade, clothing and labeled sunscreen use are broad protection options. It also supports that for some people a skin injury triggers new spots or patches, and it names cuts, scrapes and burns. The wound a tattoo makes can lead to the Koebner phenomenon, with new spots appearing about 10 to 14 days later. It supports that a tattoo added for pigment may not blend with natural skin color, that its color can eventually bleed, and that the vitiligo underneath can spread over time. It supports the page telling readers to avoid tanning, indoors and outdoors, because tanning increases the contrast between natural skin color and the light spots and patches. That is what it says makes vitiligo more noticeable. It supports that tanning beds, sun lamps and other indoor tanning devices are not safe alternatives to the sun. Like the sun, they can burn skin that has lost pigment and worsen vitiligo. It supports that a bad sunburn can worsen vitiligo, and that on a lighter skin tone untanned skin often makes the spots and patches less noticeable. It supports that self-tanners and skin dyes tend to last 3 to 5 days, against one day for makeup. It names dihydroxyacetone as the ingredient to look for, and says natural-looking results take practice. It supports that vitiligo increases the risk of some other diseases such as thyroid disease, and that a dermatologist can monitor for them.
What it does not support
The page acknowledges support from Incyte Dermatology, so it does not independently establish treatment efficacy. It does not establish a personalized sun plan, a product ranking or a treatment-day instruction. It gives no frequency for injury-related patches and no way to tell in advance who they happen to. It gives no measure of how much tanning changes contrast, no threshold for a bad sunburn, and no way to tell whether one person’s vitiligo will worsen. It compares no tanning device with prescribed narrowband UVB and establishes nothing about medical phototherapy. It names no product or brand for camouflage, self-tanner or skin dye.
Claim-specific review for this source is still in progress. Only the source-level evidence and limits are shown here.
- DermNet (author Luo A, chief editor Oakley A)Patient education · Patient education, tier 5Independent source
- Published
- SteadySkin last checked
What this source can and cannot tell you
What this source supports
Supports the naming only: that the Koebner phenomenon is also written Köbner phenomenon and is also called the isomorphic response, and that vitiligo is one of the conditions in which it is regularly described. It is cited here so that a reader has both search terms the literature is filed under.
What it does not support
It is a 2014 reference page written by a medical student under a dermatologist chief editor, and it is not evidence for how often this happens, for whom, or for what any particular injury will do. Nothing on it is used here for frequency, prediction or a course of action.
Claim-specific review for this source is still in progress. Only the source-level evidence and limits are shown here.
- National Institute of Arthritis and Musculoskeletal and Skin DiseasesPatient education · Patient education, tier 5Independent source
- Published
- SteadySkin last checked
What this source can and cannot tell you
What this source supports
Supports that vitiligo is an autoimmune disease in which the immune system attacks melanocytes. Researchers believe family history and genes may play a role. An event such as sunburn, emotional distress, or chemical exposure can sometimes trigger vitiligo or make it worse. These are contributing factors, not a single determined cause repeated in every case.
What it does not support
It does not state that there is no single known cause. It does not rule out a specific trigger for one individual. It does not let a reader diagnose their own cause from a remembered event or timeline.
Claim-specific review for this source is still in progress. Only the source-level evidence and limits are shown here.
- PLOS ONE (Henning SW, Jaishankar D, Barse LW, et al.)Observational study · Clinical research, tier 2Independent source
- Published
- SteadySkin last checked
What this source can and cannot tell you
Why the independence label says this: Funded by a National Cancer Institute grant. The article states the funder had no role in study design, data collection, analysis, the decision to publish, or manuscript preparation. The authors declared no competing interests.
What this source supports
Supports that a group of 100 people with vitiligo felt more stress on average than 25 matched people without it (score 19.3 vs 13.8). Women in the vitiligo group felt more stress than men in it (21.53 vs 19.4). The study found no link between stress score and either disease activity or how much skin was affected. Depression showed up at similar rates before and after diagnosis. The authors read that as pointing to something shared underneath, not one causing the other.
What it does not support
Does not show that stress causes vitiligo to start or spread, or that less stress changes vitiligo. This is one survey of self-reported stress over the past month, not a body test. The authors say the design cannot prove cause and effect. Does not predict any one person's course.
Claim-specific review for this source is still in progress. Only the source-level evidence and limits are shown here.