Why Skin Breaks Out More in Summer Heat: 4 Proven Mechanisms [2026]Why Skin Breaks Out More in Summer Heat: 4 Proven Mechanisms [2026]
Summer heat increases acne by 35–50% through four converging mechanisms: SREBP-1 sebum overproduction (+31% per 5°C), sweat-pH microbiome disruption, UV immunosuppression, and heat-induced barrier weakening (TEWL 12–18 g/m²/h). Learn the