Dizziness caused by drinking a lot of water is related to these factors, first of all, a large amount of water into the body, rapid replenishment of blood volume, which will lead to a transient increase in blood pressure, patients with dizziness and discomfort, at this time, it is recommended that the patient quiet rest, to avoid strenuous activities to further increase blood pressure. After quiet rest, the blood pressure may drop to a certain extent, and the symptoms can be relieved. The blood volume decreases after the patient urinates several times, and the blood pressure can be stabilized. In addition, some patients eat poorly, the body’s sodium content is low, after drinking a lot of water, the same water will enter the blood, causing patients to hyponatremia, severe cases can be accompanied by cerebral edema and other symptoms, dizziness and discomfort, and even nausea, vomiting, for this part of the patient can be appropriate supplementation of sodium, the symptom can be relieved.