In nocturnal polyuria, the 24-hour urine output (diuresis) is normal or only slightly increased, but the shift of diuresis from daytime to night time disrupts the night sleep quality at night.

These tests may include blood draws, urine dip tests, or 24-hour urine collection. In some cases, they may order imaging of your kidneys. Foamy urine caused by a fever, infection, dehydration ...