If you have a distended stomach and urine, it is recommended that you go to the hospital for relevant examinations to clarify the possible causes: 1. Acute cystitis or urethritis, you can have a distended stomach with reduced urine volume, increased frequency of urination, pain in the urethra, etc. This is due to mucosal congestion and edema after infection. If you have a stone in the lower part of the ureter, you may have small abdominal distension, decreased urine volume, interruption of urination, increased frequency of urination or hematuria, and ultrasound examination of the bladder area is needed to rule out stones. 3, if you are a male, you may also have prostatic hyperplasia or prostatitis, and you may have small abdominal distension or perineal distension and discomfort, with difficulty in urination, and a small amount of urine each time. The volume of urine is not much, but there is an increase in the frequency of urination or an increase in the frequency of nighttime rising, etc. Ultrasound examination of the urinary system is required to confirm the diagnosis.