Sun damage: what causes it and what you can change
Sun damage rarely has one cause. This page unpacks cumulative UV, skipped SPF and tanning without reapplication and shows how to test which one is yours without overhauling your routine.
The main drivers behind sun damage
Consider cumulative UV. It is linked with sun spots, which makes a dated note of when you first saw that sign genuinely useful.
Skipped SPF often sits behind crepey texture. The fix is usually a small habit change rather than a new product.
Everyday triggers to log this week
Beyond the headline causes, small habits add up: unreapplied SPF, car windows, snow and water glare, and tanning beds. Keep a note on your phone for seven days — product used, hours slept, sweat or heat exposure and stress level.
Then photograph or scan the same zones each evening: cheeks, nose, forehead, chest and the backs of hands. Patterns tend to jump out when the data is in one place.
Run a two-week experiment
Week one: change nothing and record baseline. Week two: apply SPF 50 as the last step every morning and reapply when outdoors. Because only one variable moved, any change in sun spots can be linked to it.
A common belief is that tanning bases or a few sunny days a year don't count; in practice UV exposure is cumulative, so daily protection matters more than occasional vigilance, so resist the urge to escalate if week two looks quiet.
Hold the line on what you avoid
While you test, avoid new tanning while treating spots. These are the most common ways people accidentally reinforce the cause they are trying to remove.
If the pattern does not respond after a full cycle (three to six months for visible tone and texture improvement), involve a professional, particularly for new, changing or non-healing spots — get these checked by a skin professional.
Where to look when tracking sun damage
Skin rarely changes everywhere at once, so score each zone separately and note the date.
A quick self-audit
Answer honestly before adding or swapping a product. Most plateaus are explained by one of these.
Frequently asked questions
Can cumulative UV alone cause sun damage?
It can be a major contributor, but sun damage usually has several drivers at once. Fixing cumulative UV first is sensible because it is cheap to test.
How do I know which cause applies to me?
Change one variable for two weeks and keep a log. If sun spots eases when only cumulative UV changes, you have a lead.
Is sun damage caused by a dirty face?
Rarely. The idea that tanning bases or a few sunny days a year don't count is a persistent myth; UV exposure is cumulative, so daily protection matters more than occasional vigilance.