The most common causes of lumbosacral pain are chronic strain, trauma, sacroiliac arthritis, lumbar disc herniation, ankylosing spondylitis, pelvic inflammatory disease, etc. If the symptoms persist, it is recommended to seek medical treatment in time. 1. Chronic strain: If the patient is engaged in heavy physical labor for a long time, it causes chronic strain of lumbosacral muscles, which will cause pain when stimulated by cold. 2. Trauma: the patient’s lumbosacral area has been hit by the outside, causing local muscles, blood vessels and bones to be damaged, which will also cause pain. 3. Sacroiliac arthritis: clinically manifested as lumbosacral pain and dysfunction, patients may also have morning stiffness, which is mostly related to the degenerative changes of articular cartilage. 4. Lumbar intervertebral disc herniation: degenerative changes in the lumbar intervertebral discs, compression of the surrounding soft tissues can also cause pain in the lumbosacral region. 5. Ankylosing spondylitis: Ankylosing spondylitis mainly involves the sacroiliac joints, which can cause lumbosacral pain and activity limitation, and it is an autoimmune disease. 6. Pelvic inflammatory disease: If you are a female patient, inflammation in the pelvic area can also cause lumbosacral pain, and you need to control the inflammation in time. Causes of lumbosacral pain are more reasons, may also be related to scoliosis, fatigue fracture, urinary tract infection, urinary stones and other diseases, if there is no relief after resting, it is recommended to go to the hospital in a timely manner to find out the cause of the disease, by the doctor targeted treatment.