It is usually possible to drink glucose water after diarrhea. After diarrhea, patients are prone to lose part of the body’s water and electrolytes, especially after more severe diarrhea, may also cause water and electrolyte imbalance. Moderate glucose supplementation can help the body to replenish a certain amount of energy and body fluids, which can help improve the patient’s dehydration. However, it should be noted that it should be applied reasonably under the guidance of a doctor, so as not to cause adverse reactions such as hypokalemia, hyponatremia and hypophosphatemia after drinking too much. In addition, diabetic ketoacidosis is not controlled, as well as hyperglycemic non-ketotic hyperosmolar state of the patient is prohibited to use. It is recommended that patients with severe diarrhea seek medical treatment as soon as possible, do not blindly self-medication, so as not to cause adverse reactions.