Lumbosacral sprain and strain injuries are injuries to the soft tissue structures that surround the spine of the lower back. A sprain refers to an injury of a ligament while a strain refers to an injury of a muscle. Sprains and strains typically occur following a forceful or rapid twisting or bending movement which causes overstretching and possible tearing of the ligament or muscle fibres.
Lumbosacral sprain and strain injuries present as pain in the lower back, often only on one side with increased pain upon certain bending or twisting movements as well as muscle spasm and stiffness. The area surrounding the injury may also be swollen and tender to the touch.