Ugh, my lower back is killing me today. Woke up at 3 am with it in pain and it hasn't eased yet, despite codeine and Ibruprofen. The pain is actually making me nauseous. Not often this happens but when it does, whoo boy... 😩
Aspercreme makes a roll-on lidocaine that's helped me when my lower back gives me grief. Maybe it will help you?
My dad swears by aspercreme