The causes of prostate enlargement and abdominal distension include urinary retention, cystitis, bladder stones and so on. 1. Urinary retention: Due to the continuous growth of the prostate gland, it presses on the urethra, causing patients to have difficulty in urination and urinary retention, which triggers the symptoms of swelling and pain in the abdomen of patients. 2. Cystitis: when the prostate gland continues to proliferate, causing difficulty urinating, urine stays in the bladder for a long time, easy to breed bacteria, causing patients to develop cystitis, inflammation continues to stimulate, resulting in symptoms of abdominal distension. 3. Bladder stones: prostate enlargement patients due to repeated urinary difficulties, urine retention, resulting in repeated infections in the urinary tract, easy to form deposits, triggering patients to bladder stones, which leads to the patient’s small abdominal distension. Enlarged prostate small abdominal distension may also be caused by other factors. If the patient has the above symptoms, it is recommended to go to the regular hospital in time to improve the relevant examination, to clarify the cause of the disease, follow the doctor’s instructions to take targeted treatment measures, and strive for early recovery.