Heat plus humidity is exactly what Malassezia (the fungal-acne yeast) likes. The monsoon months are when ingredient lists matter most for acne-prone Indian skin.
Malassezia — the yeast behind fungal acne (those uniform, itchy forehead/chest bumps) — feeds on certain fatty acids, esters and oils, and thrives in warm, humid, sweaty conditions. In published dermatology literature it is strongly associated with hot-humid climates, which is why complaints spike across India from June to September.
General educational information for Indian skin, compiled from published dermatology literature and structured ingredient data. Not medical advice.