The pain on the right side of the lumbar spine after a fall may be caused by acute lumbar sprain, lumbar spondylolisthesis, lumbar spine fracture and other reasons, as follows. 1. Acute lumbar sprain: falling can make the lumbar muscles, fascia or ligaments and other soft tissues suddenly subject to external forces, resulting in excessive tension caused by acute injury, if the right lumbar peripheral soft tissue injuries, there will be lumbar spine pain on the right side of the lumbar vertebrae, activity restriction and other symptoms. 2. Lumbar spondylolisthesis: trauma can lead to lumbar vertebral arch isthmus collapse, bone discontinuity, which leads to slippage between vertebrae, when the slipped vertebrae involve the right side of the nerves, it will cause lumbar spondylolisthesis right pain, also can be accompanied by the lower limb pain, intermittent claudication and so on. 3. Lumbar spine fracture: Lumbar spine fracture caused by a fall can cause a series of nerve and muscle injuries, when the right side of the lumbar spine involves the nerves, paraspinal muscles and ligaments, it will lead to pain on the right side of the lumbar spine, in addition to urinary and fecal incontinence, activity restriction and other conditions. It is recommended to go to the hospital in time to improve the relevant examination, clear diagnosis and early treatment.