“…According to the ICS terminology report, urgency is defined as 'the complaint of a sudden compelling desire to pass urine, which is difficult to defer' [3]. Although this definition appears clear at first sight, it seems to have inherent difficulties and has been the subject of numerous reports and communications [2,[4][5][6][7][8]. The main critics or questions are: is urgency a separate pathological sensation, or an extreme form of a normal sensation; does urgency always occur suddenly or can it result from a gradual build-up of sensation; is urgency one uniform sensation or do different types or grades of urgency exist.…”