Yes it is true that your can drink too much water. You can have an excess of everything, even water…
We should only drink as much water as we feel thirsty for. Drinking too much water can lower the important levels of minerals such as salt, or sodium in your blood to a dangerously low level.
This can lead to a condition called hyponatremia or water intoxication. It can induce headache, nause, vomiting, tiredness, muscle spasms and seizures. In the rarest of cases it can lead to coma or even be fatal.
So please listen to your body and drink only as much waster as you feel thirsty for.