A 1cm stone cannot be expelled through the ureter, but in rare patients who have had several stone expulsions, a stone of about 1cm may be expelled. However, in the majority of patients, the stone cannot be expelled, and then it can become lodged in a section of the ureter and cause acute obstruction, causing severe pain or nausea, vomiting, frequent urination, urgency, or hematuria. It is recommended to go to the hospital immediately for symptomatic pain management and extracorporeal shock wave lithotripsy or direct surgical treatment to break the stone and remove it, or to break the stone and expel it by the patient. In the process of stone removal, it is necessary to drink more water and urinate more, and most of the stones can be removed by themselves if they are broken down to less than 6 mm. However, if the stones are broken more than 4 times without any change in size and location, extracorporeal shock wave lithotripsy is not recommended and inpatient surgery is recommended. If the stones are infected, anti-infection treatment is required and surgery or extracorporeal shock wave lithotripsy should be performed after the infection has been controlled. Otherwise, the above treatment measures may lead to the spread of infection and worsen the symptoms of painful kidney stones or ureteral stones.