Acne starts when dead skin, oil, and debris clog pores. It can be: Non-Inflammatory: Whiteheads, blackheads, and subclinical acne (small bumps, not red). Inflammatory: Papules, pustules, nodules, cysts (red, swollen, often painful). Whiteheads, Cause: Clogged pores. Look: Small, white or skin-colored bumps. Fix: Exfoliants (AHAs/BHAs) – Clear out dead skin. Retinol – Speeds skin turnover. Clay/Charcoal Masks – Absorb oil. Peels – For stubborn or recurring breakouts