These lower back stretches are nearly always used in all forms of lower back pain. The first one in the series is used in acute pain and can be used to gently get the back moving and mobilising it in an easy fashion.
For Acute Back Pain
Rock Back and Forth over heels
Lying on your back and stretching.
Legs Side to Side
Stretching Sciatic Nerve
Low Back Stabalisation
Strengthening Lower Back during Rehabilitation