The lumbar pole generally refers to the lumbar region, lumbar pain and distension, consider that it may be related to lumbar muscle strain, lumbar intervertebral disc herniation, osteoporosis, cold and other reasons. 1. Lumbar muscle strain: engaging in heavy physical labor for a long time may lead to muscle strain in the lumbar region, and the muscle fibers become congested and edematous, which may lead to lumbar pain and swelling. 2. Lumbar disc herniation: degenerative changes in the lumbar spine and overwork can lead to lumbar disc herniation. The herniated nucleus pulposus tissue may irritate the fascia and soft tissues around the lumbar spine, which may also cause lumbar pain and swelling. 3. Osteoporosis: With age, the body gradually loses calcium, which is prone to osteoporosis, leading to lumbar instability. It is also easy to have lumbar pain and swelling during activities. 4. Cold: When the lumbar region is cold, it may affect the local blood circulation. A large amount of metabolic waste accumulates in the lumbar region, which may also cause lumbar pain and swelling. There may also be other clinical causes of lumbar pain and swelling. It is recommended to go to the orthopedic department of the hospital as soon as possible, and cooperate with the doctor to improve the CT and other related examinations to clarify the cause of the disease.