Over hydrating can actually be quite serious.
The sodium and other bits around your cells get diluted, whe that happens it will slowly seep into your cells and cause them to swell, something to do with the osmotic pressure in your body.
Well, you know blood takes a cycle aroumd the body before coming back to the heart right, so this diluted blood may end up reaching the brain, limbs ect.
So if your hands and feet get a bit swollen it might be a sign to cut it back a bit.
But when these swollen cells reach the brain, it will most definitely cause the brain to swell to.... Leading to death.
So be careful not to drink too much yeah? :)
Hope I was helpful!!
Drinking too much water rarely causes overhydration when the body's systems are working normally.
On the other hand, people with heart, kidney, or liver disease are more likely to develop overhydration because their kidneys are unable to excrete water normally. It may be necessary for people with these disorders to restrict the amount of water they drink and/or adjust the amount of salt in their diets.
Hope this helps!