I had foot pain 4 years ago, but now I sometimes walk a bit abducted when I have pain, often the sides of the sacroiliac (buttocks) can not sit for a long time, lumbar pain forward bending Examination: erythrocyte sedimentation rate ESR-37. Anti-“O” ASO-10.00. rheumatoid factor-1.90. C-reactive protein CRP-3.830. physiological curvature of the lumbar spine straightened, with osteophytic changes seen on the side of the L4_L5 vertebrae. There was no abnormality in the height and signal of each vertebral body. There was no stenosis between the vertebral bodies, and the T2 signal of the L3_L4 disc was reduced, while the signal of the other discs was not abnormal. There is no abnormal signal in the cauda equina spinal cone within the dura mater. What disease can cause the lumbar spine physiological curvature straightening, L4_L5 vertebral body side see the osteophyte changes ah? Straightening of the physiological curvature of the lumbar spine is a common cause of low back pain. There are many reasons for straightening of the curvature, most commonly in sedentary, thin-bodied people, and strictly speaking, straightening of the lumbar curvature is also a lumbar deformity, but unlike scoliosis deformity, it requires surgical treatment. Osteomalacia is an x-ray sign, mainly caused by long-term lumbar instability. Prevention: strengthen the strength of the lumbar back muscles, hot compresses, physiotherapy, avoid sedentary.