answer:Sometimes acne has an internal cause. A lot of times this is the case when you try everything and just can’t get rid of it. So this isn’t internal but make sure you wash your hair regularly and change your pillow cases. Now, internally an example would be a high intake of greasy foods, chocolate, coffee. You may also try a scrub on top of your regular acne treatments. Like an apricot scrub. It cleans a bit deeper.