Drinking water in moderation will not cause harm to the human body. When drinking too much water, it increases the burden on the kidneys and may lead to water intoxication, headache, nausea and vomiting, memory loss and other symptoms. Water is essential to the human body, the normal human daily fluid intake of 2000 ~ 2500ml, except for the water contained in food and nutrients oxidation of metabolic water, the daily required amount of water is 1500 ~ 1700ml. When you drink too much water, the kidneys excrete the excess water. When excessive water intake exceeds the kidney’s drainage capacity, water intoxication may result, with cellular edema and increased extracellular fluid. When brain tissue edema occurs, it may lead to headaches, nausea and vomiting, and memory loss in severe cases. Normally, you can adjust the amount of water you drink according to the amount of exercise, temperature, etc., but drinking water is not the more the better, and it is recommended to drink small amounts of water several times.