Psychology says people who always pop their pimples don’t have the urge for clear skin, they may be responding to their brain's reward system

Popping a pimple creates a short-lived feeling of relief or accomplishment for many people, which can strengthen the behavior each time it happens. Rather than reflecting poor self-control, the habit is often reinforced because the brain begins to associate it with a temporary sense of satisfaction, making the urge increasingly difficult to resist.

Raccontata daeconomictimes.indiatimes.com