What are the dangers of drinking a lot of water

Generally speaking, drinking a lot of water for people with normal heart and kidney function may lead to water intoxication, etc. For people with unhealthy heart and kidney function, in addition to water intoxication, it will also aggravate the burden on the heart and kidney, resulting in tightness in the chest, suffocation of breath, difficulty in lying down, and aggravation of edema.
Generally speaking, for people with healthy heart and kidney function, the daily water intake of 1500-1700ml is more appropriate, and the water intake can be 2000-2500ml in summer when sweating is more.
For people with kidney stones or poor glycemic control, a daily water intake of 2,500-3,000ml is more appropriate, more than this amount is likely to cause water intoxication, electrolyte disorders, aggravating the burden on the kidneys and heart.
For people with proteinuria, hypoproteinemia, nephrotic syndrome and people with underlying cardiovascular disease and cardiac insufficiency, they should drink a moderate amount of water under the guidance of a doctor to avoid excessive drinking of water to appear chest tightness, breathlessness, difficulty in lying down and worsening of swelling and other symptoms.
Therefore, in daily life, drinking water in moderation, so as not to overdrinking lead to water intoxication, affecting the brain function is impaired, if you drink more than 4000mL of water, you should be vigilant about organic lesions, go to the hospital in time for examination.