Frequent urination small abdominal cramps, it is recommended to go to the hospital for further examination to clarify the specific causes. Possible causes: 1. Acute cystitis, when patients have acute cystitis, they can have obvious urinary frequency, urinary urgency, painful urination, etc. They can also have painful small abdominal cramps, accompanied by a sense of incomplete urination, and serious patients may also have symptoms of hematuria or fever, and need to retain urine for routine laboratory tests and urine culture tests to confirm the occurrence of bladder infection. 2. Stones in the urinary system, bladder stones or Lower ureteral stones can cause strong urinary tract irritation, producing frequent and urgent urination, accompanied by pain in the area where the stones are located, such as low back pain or small abdominal cramps and pain. The pain level is relatively intense and requires an ultrasound examination of the urinary system to rule out the presence of ureteral stones or bladder stones.