Clinical manifestations of stone blocked ureter: 1. severe back pain, when the stone blocks the ureter, the urine produced by the kidney cannot be discharged through the ureter, which can produce hydronephrosis, and the pressure of the kidney will rise acutely, which will cause obvious symptoms of back pain. 2. symptoms of nausea and vomiting, the innervation of the ureter and the innervation of the gastrointestinal tract have certain traffic branches, and acute obstruction of the ureter can Acute obstruction of the ureter can cause spasm of the gastrointestinal tract, resulting in symptoms of nausea and vomiting; especially when the upper part of the ureter is acutely obstructed, accompanying symptoms of the gastrointestinal tract can easily appear. 3. hematuria, when the stone causes obstruction, causing local mucosal rupture, bleeding or combined infection, it can cause mucosal bleeding, and the patient can have red urine during urination. 4. decreased urine volume, when the stone causes complete obstruction of the ureter, the urine produced by the kidneys cannot be used. The urine produced by the kidney cannot be discharged into the bladder and eliminated from the body, there will be less urine volume.