Can drinking too much water cause a problem for the body?

Drinking "too much" water CAN cause a serious health problem. Overdrinking water can lead to hyponatremia by diluting the sodium (salt) in your body. When this occurs, the brain takes on water in its cells and causes swelling in the brain, which is much like swelling in the brain from trauma-caused swelling of the brain. It can actually kill the person to whom it happens.