The disadvantages of drinking too much water are as follows:

1. From the perspective of brain function, after drinking a lot of water, the human body is prone to feeling tired, appetite is greatly reduced, and the head feels dizzy. Shen Shen. Doctors pointed out that this is because drinking too much water dilutes the blood, which affects the oxygen exchange of cells throughout the body. Once brain cells are deprived of oxygen, people will become sluggish.

2. Excessive water intake will increase the burden on the heart and kidneys. Therefore, people with heart disease, high blood pressure, kidney disease and edema should not drink a large amount at one time. People who sweat a lot due to labor or exercise will also It is not advisable to drink too much at one time.

3. Excessive drinking will cause excessive loss of salt in the human body, and some water will be absorbed into tissue cells, causing cell edema. Symptoms such as dizziness, weakness, and rapid heartbeat may initially appear. In severe cases, convulsions, unconsciousness, and coma may even occur, which is water intoxication.

4. At night, because you are afraid that excessive nocturia will cause a burden on the kidneys, you should reduce it appropriately; because people have gastric acid secretion when they are hungry before meals, drinking too much will affect concentration and digestion.

5. Drinking too much water will sharply increase blood volume and increase the burden on the working heart, which requires strong contraction to compensate. The kidneys excrete a large amount of water in a short period of time, which also consumes energy. Repeated work will cause the heart and kidneys to "fatigue" and cause their functions to decrease.