Nocturia is a major problem in the elderly and can be caused by a range of urologic and nonurologic conditions.Age-associated physiologic, structural,hormonal, and histologic changes play an important role in the increasing incidence of nocturia in elderly patients.Benign prostate hyperplasia (BPH) has been suggested as the main factor triggering nocturia, and therefore,efforts have focused on alleviating BPH through medical or surgical treatment.Although male lower urinary tract symptoms (LUTS) have traditionally been attributed to BPH, much evidence has shown that LUTS in some male patients might be derived from the bladder or systemic conditions.