Breathing, sweating, and even getting up to urinate in the middle of the night all contribute to fluid loss. The problem arises when you drink too much H2O, especially right before bed. It could easily lead to having to get up to use the restroom, and the sleep interruption sleep can wreak havoc on one’s health.
As people get older, they could also suffer from conditions that make having to get up to go to the bathroom more likely. An overactive bladder, diabetes, and even certain medications can all have the effect of making one need to use the restroom at night. Because of this, it may be best to consume your last glass of H2O at least three hours before bedtime.