Another potential cause for lower back pain is bone cancer, which begins as tenderness that gradually progresses to persistent pain.
The NHS says: “Pain caused by bone cancer usually begins with a feeling of tenderness in the affected bone.
“This gradually progresses to a persistent ache or an ache that comes and goes, which continues at night and when resting.
“Any bone can be affected, although bone cancer most often develops in the long bones of the legs or upper arms.”