Children drinking too much water may cause edema, hyponatremia and other hazards, it is recommended not to let children drink too much water. 1. Edema: drinking too much water will increase the metabolic burden on the kidneys, affecting the osmotic pressure in the body, leading to abnormal water-salt metabolism sodium retention, which can be manifested as facial, lower limb, abdominal edema. 2. Hyponatremia: drinking too much water in a short period of time, the relative lack of sodium ions in the body will cause hyponatremia, which can be manifested as nausea and vomiting, loss of appetite, dizziness, headache and other discomforts, check the electrolyte quintuple can suggest that the serum sodium is low, then you need to replenish the sodium chloride to correct the electrolyte disorders. When children drink too much water edema, headache, vomiting and other discomforts, should consult a doctor in a timely manner, in accordance with the doctor’s instructions to standardize the use of drugs, should control the amount of water.