Acne: what causes it and what you can change
Acne rarely has one cause. This page unpacks excess sebum, friction from phones or masks and inconsistent cleansing and shows how to test which one is yours without overhauling your routine.
The main drivers behind acne
Excess sebum often sits behind breakouts along the jawline. The fix is usually a small habit change rather than a new product.
Consider friction from phones or masks. It is linked with congested pores, which makes a dated note of when you first saw that sign genuinely useful.
Everyday triggers to log this week
Beyond the headline causes, small habits add up: phone screens, helmet or hat bands, pillowcases changed too rarely and heavy hair products near the hairline. 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: jawline, chin, forehead and the sides of the nose. 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: replace a stripping cleanser with a gentle gel and add a single BHA night. Because only one variable moved, any change in breakouts along the jawline can be linked to it.
A common belief is that scrubbing harder or washing five times a day clears breakouts faster; in practice friction and stripping inflame spots and push skin to produce even more oil, so resist the urge to escalate if week two looks quiet.
Hold the line on what you avoid
While you test, avoid heavy occlusive layers on active breakouts and over-exfoliating daily. 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 (six to eight weeks, because follicles need a full turnover cycle before a routine change shows), involve a professional, particularly for deep painful bumps, scarring that keeps appearing or sudden severe flares.
A zone-by-zone check
Use the same angle and the same window light each week, then look at one zone at a time.
Six questions to ask yourself
Answer honestly before adding or swapping a product. Most plateaus are explained by one of these.
Frequently asked questions
Can excess sebum alone cause acne?
It can be a major contributor, but acne usually has several drivers at once. Fixing excess sebum 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 breakouts along the jawline eases when only excess sebum changes, you have a lead.
Is acne caused by a dirty face?
Rarely. The idea that scrubbing harder or washing five times a day clears breakouts faster is a persistent myth; friction and stripping inflame spots and push skin to produce even more oil.