Essential oils are very helpful when you have a good knowledge of them and you know how and when to use them. Not all oils are safe to use on the face, in fact, some may result in the formation of pigmentation on the skin if used and then exposed to the sun. The other thing to bear in mind, is WHAT results you want? Are you using them for hydration? For blood circulation? For breakouts? What is it that you are trying to achieve with the oils?