There are several possible causes of waist pain when bending: first, lumbar muscle strain, lumbar muscle strain is often due to chronic muscle damage due to cold or strain, which can lead to symptoms of waist pain when bending, then the relevant examination and examination should be conducted to exclude other diseases for early diagnosis and treatment; second, lumbar dorsal myofasciitis, patients with lumbar dorsal myofasciitis can also have symptoms of waist pain when bending. Third, lumbar disc herniation, when the lumbar disc herniation compresses the nerve, the symptoms of lumbar pain when bending can also appear, then we should conduct CT and MRI of lumbar disc for diagnosis and treatment; Fourth, lumbar instability and lumbar spine slippage, lumbar instability and lumbar spine slippage can also appear the symptoms of lumbar pain when bending, then we should Early lumbar spine X-ray, CT and MRI examinations should be taken for early diagnosis and treatment.