Extreme physical conditions where is the dehydrated brain himself the production of antidiuretic hormone over hydrated brain slows or even stops releasing it into the blood sodium electrolytes in the body become diluted causing cells to swim in severe cases kidneys can't keep up with the resulting volumes of Karen water intoxication that occurs possibly causing headache and in rare instances seizures that's pretty extreme situation
Normal day-to-day basis maintaining a well hydrated system is easy to manage for those of us in enough to have access to clean drinking water from a long time that we should drink glasses a day estimate has since been fine tuned down the consensus is that the amount of water we need to buy depends partly on her weight and environment recommended daily intake varies from between 2.5 to 3.7 L of water