We advise you to do the individual sensitivity test before using an essential oil in order to avoid any allergic reaction. You put a drop in the hollow of the elbow or inside the wrist and if after 10 minutes you do not notice any reaction (redness, itching…) you can tolerate this EO. Given their very concentrated nature, it is always recommended to dilute the essential oils in a vegetable oil for cosmetic application, unless you target a very small area such as a pimple or a small wound, by choosing the appropriate essential oil.