Small abdominal distension with normal gastroscopy may be caused by urinary stones, urinary tract infections, intestinal infections, and female pelvic inflammatory disease. 1. urinary stones: for example, ureteral stones, kidney stones in the attack of pain can be involved in abdominal distension. 2. Urinary system infections: for example, acute cystitis, acute pyelonephritis, due to inflammatory factor stimulation leading to abdominal distension, accompanied by urinary tract irritation signs such as frequent urination, urinary urgency, urinary tract irritation. 3. Intestinal infections: Bacterial, viral and parasitic infections in the intestinal tract can lead to abdominal distension and pain, increased frequency of bowel movements and other symptoms. 4. Female Pelvic Inflammatory Disease: Inflammation of the female pelvis causes congestion, leading to abdominal distension, abnormal leukorrhea, lumbosacral pain and other symptoms. Gastroscopy of abdominal distension is normal, there may be other reasons, it is recommended to consult a doctor to identify the cause of the disease, and follow the doctor’s instructions for treatment.