Catheter-related bladder discomfort (CRBD) secondary to an indwelling urinary catheter is
defined as an urge to void or discomfort in the supra-pubic region. This symptom complex may
cause patient agitated and exacerbated postoperative pain. In clinic, dorsal penile nerve
block (DPNB) was applied for penile surgery including circumcision and some anterior urethra
surgery. The investigators hypothesize that DPNB relive CRBD for male patients with
indwelling urinary catheter under general anesthesia.