The blend of essential oils that I have found to be effective in healing, ears included, is Tea Tree, Lavender, Eucalyptus and Helichrysum (also known as Immortal). This synergistic blend of healing oils is extremely effective against infection, inflammation and scarring. Used with a sea salt solution for cleaning piercings and un-alloyed Titanium earrings, the combined treatment is a powerful recipe for healing allergic ears.
Quality is of the essence here. First of all, what we're talking about here is pure, therapeutic grade essential oils from plants, NOT synthetic fragrance oils or perfumes, which can be toxic and typically contain allergenic compounds. One of the most important considerations is to look for a statement of purity. What you're looking for is 100% essential oil (meaning it has not been diluted, altered, or mixed with anything else). Price can be a tip off. If it's really cheap, it's probably a reflection of poor quality.
The University of Minnesota offers some helpful guidance "Most essential oils are safe and free of adverse side effects when used properly. However, as with any substance you are introducing into your body, it is important to use them intelligently ".
If you decide that essential oils could be a beneficial addition to your care routine, you can order the oils directly from Original Swiss Aromatics, or another reputable source. I am reachable to answer questions that you may have about the use of these special oils. Available in ready to use blended bottles.