Your Cheeks Have SPF. Your Mouth Has a Flavoured Stick.

Sun Protection · Published 2026-09-16 · 9 min read · 2014 words

The vermilion is thinner, wetter and aimed at SA sun. Swap menthol balm for a lip SPF stick, keep actives off the border, and treat corner cracks as a diagnosis.

Key takeaways

• Lips have a thinner barrier and less melanin than cheeks — they need their own SPF stick.
• Flavoured menthol balm trains licking and delays repair.
• Keep retinoids and acids north of the vermilion border.
• Corner cracks that last weeks need a diagnosis, not a third gift-set scrub.

Source: SA sun-protection review (Isaacs et al. 2025) applied to vermilion and perioral skin (https://pmc.ncbi.nlm.nih.gov/articles/PMC12712754/)

Cover image: Unsplash — credit