<unk>  is a<unk>  in which the<unk>  joints (synovial diarthroses, from L2 to S1) cause painful symptoms. In conjunction with degenerative disc disease, a distinct but functionally related condition,<unk>  arthropathy is believed to be one of the most common causes of lower back pain.
Facet syndrome
Back strain
Medial knee injuries
Milwaukee shoulder syndrome
Löfgren syndrome
Fibrous ankylosis
Heel pad syndrome
Failed back syndrome