If you have pain in your belly after urinating, then it is recommended to go to the hospital for examination. Common causes include the following: 1. Acute cystitis, urethritis, can occur after urinating small stomach pain, and can be accompanied by frequent urination, urinary urgency, painful urination or a sense of incomplete urination. It is recommended to carry out routine urine examination and urine culture examination. If a large number of white blood cells or elevated bacterial count is seen in the routine urine, and the urine culture culture shows pathogenic bacteria, the diagnosis can be confirmed and antibiotics are needed to anti-infection treatment. 2. If there are bladder stones, urethral stones, etc., the symptoms of pain in the small abdomen after urination can also occur. It may also be accompanied by frequent and urgent urination, and bladder stones may also present with the typical interruption of urination. The urination may be interrupted suddenly during urination and may return to normal only after changing position. This is associated with the stone moving into the urethra and causing an obstruction. Ultrasound examination of the bladder is required, and if the presence of stones is confirmed, treatment such as extracorporeal shock wave lithotripsy or transcystoscopic stone extraction is required.