It is recommended that after nine o’clock do not drink a lot of water, before bedtime can be appropriate to drink water, because at bedtime, the body’s metabolic function has not completely stopped, but also through breathing, sweating and other activities, emitting water in the body, the right amount of water can meet the needs of the body during sleep. If you drink too much water before bed, it will lead to the body’s water circulation in a saturated state, and even affect the normal physiological state of the cells, will make the body appear puffy phenomenon, such as the eyes and the thinner skin parts. For people with kidney disease, not to drink water before bedtime, will lead to frequent nighttime toilet phenomenon, and even increase the burden on the kidneys. There is no harm in drinking water before bed, but pay attention to the amount as well as their own physical quality, you can prepare a glass of water at the bedside, a glass of water when you wake up in the morning can reduce blood viscosity.