Pain in the lower back is a pathology caused by various factors, such as excessive stress or poor posture. Less common is the lower back pain caused by more serious problems like herniated discs. The most common cause of lower back pain is because the lumbar spine, the final segment of the spine, has endured excessive weight. The main symptom of this injury is pain that is usually located in the lower back, sometimes reaching the legs. This pathology may cause alterations in the different structures that form the backbone such as ligaments, muscles, spinal discs and vertebrae. In addition, lower back pain can be accompanied by a muscular contraction in the area, limiting mobility in this section of the body.