Deionized water can be drunk, but not recommended. Deionized water, that is, through industrial means to remove the anions and cations in the water, relative to the quality of ordinary drinking water is not much difference, drinking it will not produce too much harm, but it is not recommended for long-term drinking, may lead to certain diseases, such as iron deficiency anemia, mouth ulcers, osteoporosis, etc., because of the lack of the body’s required micronutrients. Daily drinking water is recommended to mineral water or plain water, not only can relieve the symptoms of thirst, but also timely replenishment of trace elements, electrolytes, etc., is conducive to maintaining the electrolyte balance of the body, replenishment of trace elements and so on. Daily drinking water should pay attention to keep clean, for the open mineral water to drink in time, should not be placed for a long time, drinking tap water, need to be sterilized, can be boiled after drinking.