Interrupted urine flow is a sudden interruption of the urine flow during urination, sometimes accompanied by severe pain in the head of the penis. The most common cause is that in prostatic hyperplasia the patient must increase the strength of the abdominal muscles in order to pass the urine. In advanced stages of the disease, the urine cannot be drained in one go, but requires another breath to continue urinating, which manifests as an interruption of the urine flow. Patients with bladder stones, bladder tumors, foreign bodies in the bladder, ureteral cysts and other diseases can continue to urinate after the stones, tumors or ureteral cyst tissues, foreign bodies, etc. can move position with the urine stream during urination. In the process of urination of patients with huge bladder diverticulum and vesicoureteral reflux combined with ureteral effusion, although most of the urine has been excreted, there is still a considerable part of urine in the diverticulum or ureter. When urination is finished, this part of urine soon enters the bladder again and produces the urge to urinate, and urinates again. This condition is called two-stage urination, rather than interruption of urine flow.