Sometimes I get bad pain in my lower back which restricts by movement specially when I try to get up or straighten my back. These days it has become very frequent ie almost everyday. It persists for 15-20 mins or max half an hour and then goes off. So I am not sure about the reason behind it. I am 5'11'' tall and weigh 75 kgs with athletic physique. I used to visit gym regularly but from past 2 weeks I am not able to gym regularly due to office work. Last time I visited it was 3 days ago, I didnt find any pain during my gym session. There is no specific timing or activity that leads me to the back pain.Kindly help me to understand this condition better and suggest what further steps need to be taken.