I use essential oils for a hunch of things, I make up balms and washes. There are a number of sites that can give you good tips and various recipes for balms and lotions for what you need. It is recommended not to use the undiluted oils directly on your skin, as they can cause irritation. I haven’t used them for headaches or wounds, but I do make a mildly astringent wash for minor scrapes and wounds with tea tree oil and witch hazel.