Patients have swelling and pain on both sides of the waist, the specific cause can be mainly determined by the location of the swelling and pain to determine the cause, there are several cases: 1, if the pain site, located at the thoracolumbar junction, no significant increase in pain or pressure pain when bending, should be considered kidney disease, such as kidney stones, nephritis, kidney cysts or kidney tumors, which is more likely to be caused by stones, patients are advised to go to the hospital for urinary system ultrasound 2.If the patient has distension and pain on both sides of the waist, located in the middle of the waist or lumbosacral area, it may be related to the lumbar muscle and fascia, mainly seen in lumbar muscle strain and lumbar myofasciitis, and the patient may be accompanied by symptoms of increased pain and local pressure when bending over. 3.Kidney deficiency or lumbar spine osteophytes may also cause distension and pain on both sides of the waist, and the patient is advised to go to the hospital for detailed examination to determine the cause of the disease so as to develop a treatment plan.