Nocturia, also called nycturia, is defined as the complaint that the individual has to wake at night one or more times for voiding. Its causes are varied and, in many patients, difficult to discern.Although every patient does not need treatment, most people seek treatment for severe nocturia, waking up to void more than 2-3 times per night. The amount of sleep a patient gets, and the amount they intend to get, are also considered in a diagnosis.