Normal people drink 2,500-3,500ml of water per day and can drink up to 4,500-5,000ml of water per day. If the amount of water drunk exceeds 5,000ml, normal people will usually develop water intoxication. Water intoxication refers to the syndrome of increased water intake caused by some central water intake disorders or abnormal secretion of antidiuretic hormone, which causes a series of endocrine disorders and ion disorders. Therefore, if the daily water intake of adults is not more than 5000ml, water intoxication will not occur. However, if water intake increases, ion disorders in the body, such as hyponatremia, dilute hypokalemia, dilute hypochlorhydria, may occur, such as weakness, dizziness, headache, nausea, vomiting, vertigo, etc.