Kidney cysts can produce symptoms of lumbago, which are related to the location and size of the cysts. If the single cyst of kidney <4cm or less will not produce obvious symptoms, if the volume increases further, then the symptoms of gradual back pain and lumbar pain can appear, and even the symptoms of lumbago can appear. If it is a multiple cyst or the cyst is located under the kidney envelope, which produces certain stimulation to the kidney envelope, it can produce further aggravation of symptoms of back pain and lumbar pain. Therefore, it is suggested that patients should go to the hospital for kidney CT or ultrasound examination to clarify the size and location of the cysts to further determine whether the lumbar pain is related to the cysts. Other diseases can also combine with lumbago, such as cysts combined with lumbar disc herniation and lumbar muscle strain, which can cause lumbago, and the results of the examination should be used to determine the specific cause of lumbago, for example, if the cyst is less than 4cm, the lumbago may be caused by lumbar disc herniation or lumbar muscle strain, which should be further judged by a specialist urologist.