When you hold urine, your stomach hurts, and it is recommended to go to the hospital for further examination to clarify the possible causes: 1. Interstitial cystitis is often due to the absence of the amino sugar layer on the surface of the bladder mucosa, which causes urine to come into direct contact with the bladder mucosa and produce a stinging sensation. This is especially true in the state of holding urine, the patient can have increased bladder surface tension, which induces pain in the bladder or suprapubic area, and can be accompanied by urinary urgency or with urinary bleeding and other phenomena that need to be further clarified by cystoscopy. 2, acute cystitis can cause pain in the small abdomen when holding urine, often due to acute inflammation resulting in bladder mucosa congestion, edema, in holding The pain is usually accompanied by frequent urination, urinary urgency or elevated body temperature, which needs to be ruled out by urinalysis. 3. This can be ruled out by ultrasound, CT or cystoscopy of the urinary system.