Walking back pain may be caused by excessive exercise, lumbar muscle strain, lumbar disc herniation, pyelonephritis and other factors. 1. Excessive exercise: A large number of lumbar exercises, such as sit-ups and rotational exercises, can lead to local lactic acid accumulation and lumbar soreness. 2. Lumbar muscle strain: keeping a bad posture for a long time can lead to lumbar muscle strain, lumbar soreness and pain, which can be relieved after rest. 3. Herniated lumbar intervertebral discs: Patients with herniated lumbar intervertebral discs may experience lumbar pain when the outer fibrous ring of the intervertebral discs is stimulated, and lumbar pain may also occur when the nerve roots are compressed, and the symptoms may be aggravated by walking, bending over, and other activities. 4. Pyelonephritis: Pyelonephritis can lead to fever, lumbar pain, urinary urgency, painful urination, frequent urination and other symptoms. Walking back pain may also have other causes, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.