It is recommended to go to the hospital for examination to clarify the possible causes: First, acute cystitis can cause painful urination and abdominal cramps, usually accompanied by frequent urination, urinary urgency or painful urination and other symptoms. Second, ureteral stones or bladder stones can also cause pain in the urine and abdomen, and may be accompanied by low back pain or painful urination, and some patients may also have hematuria. Thirdly, if the patient is female, it is also necessary to consider whether there is gynecological inflammation causing painful urinary abdominal cramps, and most of them have menstrual disorders and other symptoms. Fourth, if the patient is of advanced age, it is also necessary to consider the possible presence of bladder tumors. Cystoscopy and CT examination of the bladder area are needed to rule out this condition, which is usually accompanied by the symptoms of hematuria of the naked eye.