Lower back pain is the exact reason I'm back trolling on here. 21 years of training and I wrecked my lower back last week picking up a fucking warm up dumbbell the wrong way. Working from home, bored outta my mind.
Don't know if there's any clever cures. I take a warm bath twice a day for an hour each time and medicate the other 22 hours.
Though mine was just a freak accident and it's already healing fast. I find the most obvious things worked best. Stay away from the gym, feed your body healthy stuff, plenty of water, stretching, a lot of rest but also make a point of moving around to keep the muscle working. Also kicked the girlfriend outta bed as I need the whole area to sleep in positions comfortable to me. Sleeping on my back with my arms next to my sides feels best. Think Dracula in a coffin.
Good luck with it, it's a nasty nasty injury to deal with. And I've trained through a cracked rib, buggered shoulder joint, broken thumb and numerous other gym injuries. This one took me out with blinding efficiency.