Diarrhea and weakness may be due to severe diarrhea after acute gastroenteritis, which causes water-electrolyte disorders and nutrient loss, etc. It is recommended to promptly choose a regular hospital for treatment. Common causes and treatments: 1. Intestinal infection: acute diarrhea can be caused by various pathogenic intestinal infections, such as dysentery bacilli and cryptosporidium, which can be accompanied by systemic symptoms, such as fever and weakness. It is recommended to promptly stop diarrhea, correct water, electrolyte and acid-base balance, and at the same time carry out targeted treatment with antibiotics, antiviral or antiparasitic drugs, such as norfloxacin, nitazoxanide, spiramycin, etc.; 2. Water-electrolyte disorders: frequent diarrhea can lead to a large amount of water loss, causing electrolyte disorders, acid-base imbalance, dehydration and other symptoms, and the appearance of general weakness, fatigue, depression, and in severe cases can This can lead to coma. It is necessary to promptly consult a doctor for rehydration treatment, such as 5% glucose solution, and follow medical advice to use montelukast to stop diarrhea; 3. Nutritional loss: gastrointestinal dysfunction, resulting in impaired absorption of nutrients, patients may experience dizziness and weakness due to lack of energy in the body. It is recommended to improve the diet and choose low-fat and high-protein food, such as egg yolk and milk, or treat through intravenous nutritional support. Precautions: Pay attention to dietary hygiene on a daily basis and avoid eating spoiled and moldy food. Avoid overeating, and eat less cold, greasy, spicy, stimulating and unclean food, such as seafood and barbecue. If the symptoms are severe and persistent and cannot be relieved, it is recommended to consult a doctor in time to avoid aggravation of the condition leading to fainting and other situations.