Chronic lumbar strain is a common disease in chronic low back pain, the main symptom is long-term recurrent low back pain, often used as a general term for chronic low back pain without clear organic lesions, and some people call it functional low back pain. The main causes of chronic lumbar strain are the sequelae of acute lumbar sprains and long-term recurrent chronic injuries to the lumbar region. Acute lumbar sprain is very common, most patients can be cured after treatment, but sometimes due to untimely treatment or improper treatment, such as lumbar sprain without good bed rest, so that the injured lumbar muscle is in a long-term strained state; lumbar activities are too frequent, affecting the normal healing of the tissue; lumbar sprain in the acute phase of inappropriate massage treatment or heavy manipulation of massage and further aggravate the injury, can cause chronic lumbar muscle strain. Sometimes after a serious lumbar sprain, even if early treatment is reasonable, it is possible that the healing scar tissue area is too large, in the lumbar spine under normal activity and load is stretched and relaxation, degeneration and local ischemia, resulting in chronic lumbar pain. The functional recovery period of long-term repeated light lumbar injuries or lumbar muscles working in a forced position for a long time, such as sedentary, long Achilles tendon rupture, is mainly the stage after the postoperative wound has completely healed and the fixed cast has been removed. The main features of the injured part at this stage are ankle flexion, wound tightness, joint stiffness, muscle atrophy, etc. During this period, the following methods can be used for functional recovery exercises. Standing, lifting heavy objects, etc. can make the lumbar muscles in a long-term high-tension stretching state, local reactive inflammation, day after day can form the accumulative degeneration of lumbar muscles, resulting in chronic lumbar muscle strain. Congenital deformities of the lumbar spine such as lumbar sacralization, sacral lumbarization and occult sacral cleft can make the muscles, fascia and other tissues lack attachment points, resulting in structural weakness. When the activity is frequent or weight-bearing is increased, lumbar muscle strain easily occurs. In addition, cold and damp environment and climate change can promote the occurrence of lumbar strain injury or the aggravation of pain symptoms. The main symptoms of chronic lumbar muscle strain are: long-term recurrent lumbar pain or swelling, reduced with proper activity and frequent position changes, aggravated with excessive activity, increased pain with prolonged bending, and difficulty in straightening the waist. The symptoms can be aggravated by rainy days, wet and cold weather. There is no abnormality in the shape and movement of the lumbar region, and most of the X-ray examinations show no abnormalities, but a few of them show osteophytes or spinal deformities.