Run a 4-step routine for 12 weeks. Gentle cleanser twice a day. 2% salicylic acid leave-on at night — Paula's Choice BHA or COSRX BHA. Oil-free moisturizer (CeraVe, La Roche-Posay Toleriane). SPF 30+ every morning. Add adapalene 0.1% gel (Differin, OTC since 2016) at night for stubborn comedonal acne. Spot-treat active whiteheads with a hydrocolloid patch — Hero Mighty Patch or COSRX. Skip the squeeze. It scars and prolongs the cycle. Wash pillowcases weekly. If skin is still inflamed after 12 weeks, book a dermatologist for prescription tretinoin or spironolactone.