Recently Tea Tree Oil has gone from something I like to have around to the top item on my essential first aid kit. I'm not going to write a detailed usage guide here as such things exist all over the Internet. Wikipedia is a good place to start for a description and links to use. I have used it for toenail fungus (expect to have to use it regularly 2 or 3 times a day for quite a while) and most recently an ear infection. A person I know used it on a gunshot wound.