Drinking too much water has certain disadvantages, the normal daily human drinking water is 2500-3500mL, drinking too much water has the following disadvantages: 1, will make the kidney load, will make the glomerular filtration rate and renal tubular reabsorption rate increases, in the long run will lead to excessive workload of the kidneys, and lead to an increase in the amount of kidney load, will lead to chronic renal insufficiency and chronic renal failure. 2, people drink too much water for patients with primary hypertension, will lead to excessive sodium retention, sodium retention will stimulate the body’s renin-angiotensin system, and therefore will produce an increase in blood pressure, will cause the body stubborn hypertension. 3, for the original patients with cardiac insufficiency, and heart failure patients have a lot of bad effects, will cause cardiac insufficiency and The heart’s load increases, therefore leading to the appearance of heart failure.