Experts from the Royal College hospital in London, warn that we should not blindly follow the recommendation to drink as much water as possible. Not every person requires 2-2,5 liters of clean water per day. The researchers cite a sad example. 59-year-old woman on the recommendation of the urologist was drinking a lot of water (a glass every 30 minutes). So she wanted to "clean" the urinary system.
As a result, the patient was in the hospital with extremely low levels of salts in the blood. She had nausea, vomiting, severe headaches. Further following the recommendations of the urologist could lead to coma and death.
Yes, the body needs liquid. However, you should take into account the real needs of the body in water. In the summer you need to drink more fluid, less in the winter. It is better to listen to your body, than to blindly obey the recommendations. The best signal that you need to drink water is thirst.