My older GR just had surgery for laryngeal paralysis and has a 8 inch long incision. EO's are very expensive, and there are over 100 of them available. They should all be used diluted in a base oil. Of course, I do not recommend just buying EO's at a drugstore or health food store. Adulteration runs rampant in EO production.
Most oils are food or industrial grade.
I know of many suppliers where excellent quality oils can be gotten. If anyone wants to discuss this more, I would love to. I want to help people understand what Aromatherpay has to offer therapeutically and make it accessible and safe for people to use. Sue, I clean my home almost entirely with essential oils. When the windows are open and a breeze blows through, lovely aroma.