Get Localized Lower Back Pain Images . It's also possible that it's caused by an underlying condition. Strains happen when you stretch or tear a muscle or tendon. Dr. Tanoy Bose from www.calcuttayellowpages.com However, the following case illustrates that a localized peripheral nerve entrapment must be considered in the differential diagnosis of chronic back pain. In many cases, pain in the lower right side of your back may be caused by a pulled muscle or other injury to your back. Sacrum pain can be felt as pain in the lower back or buttocks and is typically sharp and aching. Lower back strain, a common cause of lower left back pain, is usually attributed to damage to the muscles and ligaments of the back. Trauma to the body wall, hernias, and shingles can also cause left lower quadrant pain. Low back pain (lbp) is a common complaint of adults, both in the us and worldwide. I...