Certain essential oils shouldn't be applied topically before being exposed to sunlight and UV rays. Get the full list of phototoxic essential oils!
Phototoxicity: essential oils, sun and safety - Tisserand Institute
Phototoxicity: essential oils, sun and safety - Tisserand Institute
Essential Oils and Phototoxicity - Jenni Raincloud
Sun sensitizing (photosensitizing) and essential oils.
The Science of Essential Oils: Headaches, Weight Loss, and More - Perfect Keto
Phototoxic Essential Oils (Avoid before Sun Exposure)
Understanding phototoxicity in essential oils
Phototoxicity: Essential Oil Safety Considerations, by Celeste Wilson, The Road to Wellness
How to Use Photosensitive Essential Oils - Phototoxic Sun Safety Guide
Phototoxic Essential Oils (Avoid before Sun Exposure)
How to Safely Use Phototoxic Essential Oils in the Summertime