Lumbar hamstring pain may be associated with lumbar disc herniation, lumbar spinal stenosis, sacral cysts and other conditions. 1. Herniated lumbar intervertebral disc: when the nucleus pulposus protrudes out of the annulus fibrosus and compresses the surrounding tissues, when the nerves that manage the lower limbs are severely compressed, it can cause the symptom of lumbar pain with a hamstring in the leg. 2. Lumbar spinal stenosis: Narrowing of the central canal due to various reasons can lead to pressure on the spinal cord, making the patient suffer from lumbar pain with a hamstring in his/her leg, which may be accompanied by claudication. 3. Sacral cysts: Sacral cysts are cystic lesions in the sacral canal, and when the cysts compress the peripheral nerves, a series of symptoms such as lumbar and hamstring pain can occur. There can be many reasons for the pain in the lower back and a tendon in the leg, it is recommended to go to the hospital in time to improve the relevant examination and early treatment.