👉 Overnight fluid, also known as nocturnal diuresis, refers to the increased production and excretion of urine that occurs during sleep. This phenomenon is primarily due to a decrease in the body's antidiuretic hormone (ADH) levels, which normally helps conserve water in the kidneys. As a result, more water is filtered out by the kidneys and excreted as urine during the night. This process can lead to increased urination, often resulting in a noticeable rise in urine output during the early hours of the morning. Factors such as hormonal changes, reduced physical activity, and certain medications can influence overnight fluid production.
