Drinking a small amount of water before going to bed can play a proper role in replenishing body fluids, which can play a role in improving the dilution of blood and promoting blood circulation in the organism. Because people in the sleep state is in a relatively static state, this time whether the blood circulation, or metabolism in the body, are relatively slow, this situation is easy to lead to the formation of blood clots, so the appropriate drink of water can reduce the viscosity of the blood, to prevent the formation of thrombosis. But it is not recommended to drink a lot of water before bed, because if you drink a lot of water, this will lead to an increase in the number of urination at night, which will affect the person’s sleep, resulting in poor rest and lack of sleep. And if you drink too much water, water stays in the body for a long time, on the one hand, will increase the functional burden of the organs, on the other hand, if these waters can not be discharged in time, there will be edema, especially facial edema. Therefore, it is recommended to drink a small amount of water before going to bed, but it is not recommended to drink a lot of water.