Why Heat (Not Just Sun) Triggers Melasma
24 July 2026 10 min read 648 views 0
Melasma is driven by UV, visible light and heat together, which is why sunscreen alone often isn't enough to control it.
Key takeaways
- Heat and visible light, not only UV rays, are established triggers for melasma flares.
- Tinted mineral sunscreens with iron oxide protect against visible light in a way plain sunscreens don't.
- Hormonal shifts from pregnancy or contraceptives are major underlying drivers of melasma.
- Melasma is managed long-term rather than permanently cured, requiring ongoing sun, heat and pigment control.
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