Aww sis, chest acne during breastfeeding is so common kaya you're definitely not alone, a few of us went through the same thing! Honestly, I'd suggest checking with your OB or derma first para sure kung safe habang nagbabayad ka, but sa meantime, I swear by Mama's Choice Face Wash at Face Moisturiser (they're specifically made to be pregnancy and breastfeeding-safe) and consistent gentle cleansing really helped my chest breakouts. One of my mum friends also found na regular cotton bras and keeping the area dry made a huge difference, especially since sweat and friction can make acne worse. Hugs, mama, it usually gets better once your hormones settle!