This is an excellent article outlining Dr. Kurt Schnaubelt's very successful treatment of Shingles...he runs the Pacific Institute of Aromatherapy where more information can be found on the combination of ravintsara and tamanu oil...also note the difference between ravintsara and ravinsara...two different oils. I have used this very successfully on my husband the one time he had shingles...

https://www.aromatherapybytriciaambroziak.com/single-post/2020/05/07/varicella-zoster-virus-and-shingles-how-essential-oils-can-help

"A standard treatment option for shingles outbreak is a 50:50 blend of ravintsara (Cinnamomun camphora) and foraha or tamanu oil (Calophyllum inophyllum). Ravintsara acts as an antiviral agent and Calophyllum inophyllum stimulates phagocytosis, a primary pathway to remove pathogens and cellular debris.

Application should start at onset of symptoms and applied frequently (4-5+ x/day). Dr. Kurt Schnaubelt has reported “this treatment almost invariably offers stunning relief from the excruciating pain and brings renewed quality of life.” Effects are expected within two days to a week. If pain persists after blisters disappear frequent application of Roman chamomile hydrosol may bring relief."