Patients with kidney stones have back pain and lumbago, and if they fall into the ureter, they will have acute abdominal pain and renal colic. Kidney stones are a very common disease in the urinary tract, which can be multiple or single, varying in size, and can be as small as a grain of sand or fill the entire kidney. The strength of the echo in ultrasound varies depending on the composition of the stone. Harder stones are accompanied by acoustic shadows in the back, and if they block the local renal calyces, they will form a localized fluid in the kidney. If it falls into the ureter, it will cause colic in the kidney and cause hydronephrosis. Patients in this category need to be treated promptly because prolonged blockage will cause fluid in the kidney. Increasingly serious fluid accumulation will compress the kidney parenchyma and even make it thinner, affecting the function of the kidney, and should be treated by a clinician promptly. The stone will eventually fall into the bladder and be discharged through the urethra. A mass of strongly echogenic light clusters will be seen when it falls into the bladder, and this manifestation can be used for differential diagnosis to diagnose a bladder stone. Some patients with very mild symptoms, which only manifest as bleeding in the urine, should also be seen in the hospital. Because there are many causes of urine bleeding, which may be inflammation, stones or tumors, ultrasound is the best means of diagnosis. Secondly, it is important to note that during the urinary tract examination, the bladder needs to be fully filled to be able to show the bladder and lower ureter well.