Dilution Of Essential Oils - Topical Use
Using a 2% oil dilution is generally considered a guideline for topical application of essential oils on adults when an essential oil does not have a more restricted dermal recommendation within the second edition of the Essential Oil safety by Robert Tisserand and Rodney Young. For children or elderly, cut the dilution in half. With children, use only essential oils regarded as safe for children unless you have educated yourself very well on aromatherapy for children.
Undiluted use of Essential Oils on the skin can be harmful and potentially cause severe irritation or sensitization.