If you have diarrhea to the point of deficiency, you should give timely rehydration. When you have diarrhea, besides losing water, you will also lose electrolytes. You can eat light, easily digestible liquid or semi-liquid food, such as rice soup, porridge, fresh fruit juice, etc. However, if eating is poor, drink more rehydration salts with warm water. If the symptoms do not improve after taking rehydration salts orally and the patient still continues to have diarrhea, infusion therapy should be administered, and the patient should be advised to rest in bed and eat light, warm, soft and easily digestible food. In response to the condition, strengthen rehydration, replenish electrolytes, give drugs to control infections inside and outside the gastrointestinal tract, and give protective agents for the gastrointestinal mucosa. Also, according to the degree of diarrhea, if the patient has persistent abdominal pain, atropine and scopolamine can be given to relieve the symptoms.