Women bending back pain while upright without problems may have the following causes: first, lumbar disc herniation, when lumbar disc herniation compresses the nerve roots, there can be back pain when bending back, as well as hip discomfort, double hip discomfort symptoms, severe cases will have sciatica in the lower limbs, to early lumbar spine X-rays, CT, nuclear magnetic examination, to carry out early diagnosis and treatment. Second, lumbar muscle strain and lumbar dorsal myofasciitis, lumbar muscle strain and lumbar dorsal myofasciitis, can also appear when bending back pain is obvious, or pain is obvious when cold, exertion, early physical examination and examination to exclude other diseases for diagnosis. Third, rheumatoid spondylitis or ankylosing spondylitis, can also appear when bending the pain is more obvious when exertion, while the pain is reduced when resting symptoms, to early blood tests, as well as spinal x-ray, CT, nuclear magnetic examination, to diagnose and treat. Fourth, lumbar instability, when the lumbar instability can also appear when bending back pain, but not pain when standing symptoms, to carry out X-ray, CT examination of the lumbar spine for diagnosis and treatment.