 CRBD is not uncommon in the postoperative period, especially in male patients who have had urinary catheterization after anesthetic induction under general anesthesia, and this symptom complex may cause patient agitated and exacerbated postoperative pain. According to the previous study, i.v. tramadol 1.5 mgkg administered 30 min before extubation results in reduction in the incidence and severity of CRBD. In clinical practice, tramadol is associated with side effects including nausea, vomiting, sedation, etc. Clinically, dorsal penile nerve block DPNB was applied in penile surgery, and got satisfactory pain relief effect postoperatively without side effects related to tramadol. Besides, we observed patients underwent urethra surgery with urinary catheter left in situ seldom complained of CRBD if DPNB and RB performed at the end of operation. We hypothesized that DPNB could relieve DPNB for male patient with indwelling urinary catheter insertion after induction of general anesthesia. 