Most researchers, including myself, think that it's the marketing of the beverage industry that's responsibility for this surge in fluid overload hyponatremia.
Mild hyponatremia causes few symptoms, but more severe cases can lead to brain swelling and progressive neurological symptoms, including confusion, disorientation, seizures, coma, and sometimes death.
If you drink more than that, you'll retain the excess water in your body, which causes a condition known as hyponatremia and can be hazardous to your health.
Signs of hyponatremia started to show, which basically means that your blood cells start swelling because there's not enough salt in your blood to regulate how much water a cell will consume.
If that level drops too low, say by drinking more water than your kidneys are able to process at once, then your blood becomes diluted and watery - a condition known as hyponatremia.