Furanocoumarin-containing essential oils react to UV light and can cause an inflammatory reaction in the skin. Visible reactions typically peak up to three days after initial UV exposure. The visible signs can last for weeks, and might be one or more of the following: severe redness (sunburn)
If exposed to sunlight (which gives off UV radiation) after topical application of a. Essential Oils that May Cause Phototoxic or Photosensitive Reactions:.
Learn more about how to use essential oils safely during the summer.. favorite citrus oils should be avoided topically before direct sunlight or exposure to artificial UV rays.. This immune system reaction is known as photosensitization.