@sun @Nudhul

I use wild lettuce tincture to treat my own headaches, but you can also still use willow or poplar cambium. It works. That said, what you're getting in the bark isn't asperin from the drug store. It's an unrefined precursor to asperin which has a much more potent but also short duration effect. Also you need to be careful with it because in larger or long term doses it can result in internal bleeding. This stuff still all works very well, but it's not all exactly child's play. You have to have some caution and experience, and ideally one or several good mentors. Plantago major is another good painkiller, which though milder is still quite effective, and like wild lettuce you can use it as a salad green and get all the same benefits that way and then some.