It’s not clear to you yet? Okay, I’ll share this Sutta with you to help you understand. https://accesstoinsight.org/tipitaka/an/an08/an08.054.nara.html
As you can see, violence is not always wrong or undesirable for a lay person as long as there is a necessity for it and it’s performed with a right intention. There might be a kammic consequence to it but that is another subject and Lord Buddha was clear in that any dramatic and fatalistic understanding of the Dhamma (and kamma particularly) is foolish.
As it stands now, please just talk about solutions when it comes to pain management. I will gladly discuss kamma with you in another opportunity. Thank you.