The common clinical causes of lumbar pain together with hip pain include lumbar muscle strain, lumbar intervertebral disc herniation, third lumbar vertebral transverse process syndrome, and gluteus maximus fasciitis, etc. It is necessary to further improve the examination to clarify the etiology of the disease. 1. Lumbar muscle strain: it is mainly caused by long-term improper posture of the lumbar region, exertion, etc. It is a chronic injury of the lumbar muscles, which can be manifested as pain in the lumbar region during exertion, alleviated when resting, and in serious cases, it can be accompanied by pain in the buttocks on the affected side. 2. Herniated lumbar intervertebral discs: when the lumbar intervertebral discs are herniated due to degenerative changes or trauma, and the nerve roots are compressed, the lumbar pain can be accompanied by pain in the buttocks and even the lower limbs, and some of them can be characterized by numbness. 3. Third lumbar transverse process syndrome: congestion and edema of the soft tissues at the third transverse process of the lumbar vertebrae caused by strain of the lumbar muscles and exposure to cold, involving the posterior branch of the nerve root of the second lumbar vertebrae, which can cause lumbar pain and radiating pain in the buttocks and the anterior side of the thighs. 4. Gluteus maximus fasciitis: aseptic inflammatory reaction of the fascia caused by strain, trauma, cold and other factors at the gluteus maximus muscle, obvious pain in the buttocks, and some patients may experience pain connected to the waist. It is recommended to go to the hospital in time to improve the auxiliary examination, in order to clarify the cause of the disease, and the professional physician for treatment.