Polyuria is a medical condition characterized by the production of an abnormally large volume of urine. Typically, a person produces about 1 to 2 liters of urine per day, but those with polyuria may exceed this amount significantly. This condition can be caused by various factors, including excessive fluid intake, certain medications, and underlying health issues such as diabetes mellitus or diabetes insipidus. In addition to increased urine output, polyuria may lead to other symptoms like increased thirst, known as polydipsia. It is important to identify the underlying cause of polyuria, as it can indicate serious health problems. Diagnosis often involves urine tests and blood tests to assess kidney function and blood sugar levels.