yeh OK, funny it is mentioned, I also get the hip burn on occasion, forgot about that. Hmmm...... yeh any back issues and twitching not connected ie back issues wont cause twitching.Two seperate issues. See how it goes. Burning could be back related ,seeing you have had surgery, but could be co-incidence. If it is BFS related it will settle down, probably within days. If it is progressingd or not settling , say with the next 2-3 days,( then it will be a week) then a trip to the Drs may be needed to get it checked out. Backs ( associated nerves) are strange things, and even more so after surgery! Yes, I have had lower back surgery as well, a spinal fusion, so I know the issues only too well! My burning does move on, but mostly after no more than a day or two at most, and is exacerbated by any back overuse! Keep us posted...take careRodger