One of the main problems of acute lumbago, in addition to the pain, is the inability to move.
This dilemma is often caused by your quadratus lumborum. This is one of your back muscles, which when tense can lead to severe restrictions on movement.
Pressing your hands into the muscle will usually allow you to move immediately and at least get from point A to point B.
Simply put, your quadratus lumborum muscle runs from your hip over your lumbar spine to your lowest rib.
There are two areas I recommend here, in which you manipulate the muscles.
Be sure to experiment with other positions and find the most effective location for you.