I regularly use Oregano oil on my right hand. I have used Origanum Vulgare for quite a while. I use it several times a day for red thread worms that try to invade the nail under my left thumb.
I use 3 drops on a Q tip, dipped in Castor oil in the ears. Works the best.
On bones, jaw, nose, head bones, extracts the microbial infections, bone infections, and hurts a parasites ability to function. One of the naturals that stands the test of time.