I am 51 and work where I am no my feet and do a lot of lifting 30 to 70 lbs average. I have been experiencing constant pain in my left leg, it feels like a sever hamsting injury. I can not get comfortable when I sit or stand, and do not sleep very well. the most comfertable positon is sitting with my knee bent. I really do not experience a lot of back pain, just stiffness,but when I strech my back I feel it in my left leg,are these sings of
something I need to worry about.