Back pains come from pinched or tight muscles and to get rid of those pains you have to free up those muscles involved. Not freeing them up can easily lead to other back issues, like any type of disc problems as the muscles are the only things there that can pull that hard for the extended period of time to cause the problems. Here's how to free up the muscles and save his back:
Back:
(do from a sitting position)
Place your left hand on your left leg next to your body. Place your right hand over your left shoulder, fingers over the back and the palm in the front and firmly pull down on them and hold. After 30 seconds slowly lower your body forward and to the outside of your left leg, keeping your left arm fairly straight as you do. When you reach your lap remain there for another 10 seconds, release the pressure but rest there for another 30 seconds. Then reverse your hand positions and do your right side.
For best results relax the body first by taking a deep breath and exhaling then remain this relaxed.