Im after a natural painkiller derived from a tree bark?

Answer 1

You are probably looking for White Willow Bark from which Aspirin was produced. The salicin in white willow bark is metabolized in your body to form salicylic acid, which reduces inflammation, pain and fever. White Willow is slower acting than aspirin, however the beneficial effects of white willow bark last longer and have fewer side effects than aspirin. White willow bark does not cause stomach bleeding like commercially available aspirin.