Diarrhea and lack of appetite are related to the presence of electrolyte disorders. During diarrhea, water, electrolyte components and food are excreted from the body in the form of stool, which is a protective reaction of the body. This is a protective reaction of the body, which also expels trace elements or water and other components from the body, making it easier for water-electrolyte disorders and acid-base imbalance to occur. For diarrhea and lack of appetite, a liquid or semi-liquid diet may be appropriate as an appropriate form of nutrition supply. If the symptoms persist, it is recommended to go to the emergency department or gastroenterology department to check the blood and stool routine and electrolyte indexes, and give appropriate electrolyte solution and water supplementation, which can help relieve the symptoms quickly.