There is no serious harm in drinking 8 glasses of water a day.
However, drinking more fluid than the body needs can sometimes be dangerous.
Excess water lowers blood sodium levels, which can lead to serious problems.
To maintain the required level, the body stores excess water in the brain and lungs, which leads to swelling of the body.
In the last 10 years, 15 athletes have died due to excessive water intake.
In each of these cases, the cause of death was drinking more water than the body needed.