I know about a few nature-based pain killers, but, I am wondering what are all the different kinds? I know that you can chew on the bark of a willow-tree which will give you ASA (counter-name = Asprin). I know that you can cook weed into a food to help relieve migraines. Depending on the kind of head-ache, alchohol can lessen pain. What can be added to the list of pain-killers that is easily found or grown in your own backyard?