This document discusses acute versus chronic low back pain. Acute low back pain results from tissue trauma and is self-limiting, usually resolving with staying active. Chronic low back pain lasts a long time and may be caused by segmental instability, discogenic pain, facetogenic pain, soft tissue problems, or unknown causes. It often requires a multidisciplinary treatment approach using non-operative treatments that are generally ineffective. The decision to operate for chronic low back pain is difficult as surgery is not always effective and degeneration does not necessarily cause pain.