Commonly known as “flash back”, it is the most common in lumbar spine soft tissue injury, with manual workers, occasional sports and inadequate preparation activities; the latter are mostly mental workers, indoor work all year round, lack of physical exercise. Among the vulnerable population, men are more common than women, mainly young adults, and relatively few young and old people. Although it can be seen in all walks of life, more than 60% are heavy manual laborers and athletes with high activity levels. The extent of the lesion includes the myofascial tissue from the lower back to the sacroiliac region. The front of the lumbar spine is a loose abdominal cavity, lacking other skeletal support, and its stability is mainly maintained by ligaments and muscles. When a heavy load is carried on the shoulder and the balance is lost or when the force is not applied, the strong pull or pressure generated by the leverage of the spine often causes injury to the soft tissues attached to the lumbar spine such as ligaments, fascia, muscles and joint capsule. Usually lacerations are caused at the attachment of these tissues to the bone. In patients with more severe injuries, the fascia is thickened even after healing, making the peripheral nerve branches susceptible to impingement and causing persistent low back pain and discomfort. If the injury is located in the muscle tissue, there may be varying degrees of transverse muscle degeneration and reduction or loss of transverse lines on the muscle fibers, resulting in a decrease in the strength of the low back muscles. Normally, the healing process takes about 3 to 4 weeks for muscle tissue and 6 weeks for ligaments and tendon membranes.