Citrus, Conifer and Spice essential oils can be caustic to skin, so it is advised they be diluted with vegetable oil prior to application . Angelica, Bergamot, Grapefruit, Lemon, Mandarin, Orange, Tangerine. Basil, Cinnamon, Clove, Ginger, Marjoram, Nutmeg, Pepper, and Thyme. Particular care should be taken with Cinnamon, Lemongrass, Oregano and Thyme as these are the strongest and most caustic oils. If burning occurs in the eyes or on the skin do not flush with water.
Water drives the oils deeper.
Dilute the area with pure vegetable oil. It is always safest to remove contact lenses when working with the oils. Essential oils are wonderful for children. However keep in mind they have very sensitive skin. Always dilute oils with pure vegetable oil prior to application.