A urethral caruncle is a benign vascular tumour usually originating from the rear lip of the external urethral mea and often observed in postmenopausal women. Urethral caruncle is not included within the list of bladder overdistension causes in women. We present urethral caruncle as a rare cause of acute urinary obstruction in a 41-year-old woman. The case was evaluated with physical examination and the bladder was evacuated with a 12-Fr urethral catheter. A pressure flow study was performed. The caruncle was excised under spinal anesthesia. There were no complications. The urethral catheter was withdrawn on the sixth day and she was discharged with local estrogen.