Vellen,
I have used nettles for injured arm, shoulder and knees. We call it itch weed here in Iowa. Found out about it by accident. My right arm was messed up. I to go through a bad batch of itch weed. After I went through it, I noticed that my body had the burning itch . Everywhere but where my arm was hurt. That part felt numb with a little tingle. I did like 3 days in a row and my arm was pretty good. Then I tried on other things. And seemed to work. I haven't had anybody else want to do it.