The most common causes of vomiting, diarrhea and weakness of limbs are acute gastroenteritis and gastrointestinal flu, which are directly related to mucosal damage of the stomach and intestines caused by bacteria and viruses, and mainly manifest vomiting and diarrhea. When the diarrhea is heavy and the vomiting is large, it will cause low potassium and sodium and weakness of the limbs, which requires blood tests and stool tests and ion biochemistry. If it is acute gastroenteritis, it needs to be treated with antibiotics, and the commonly used antibiotics in clinical practice are norfloxacin and levofloxacin lactate. If it is a gastrointestinal cold, it needs to be treated with antiviral drugs, which can generally be relieved with medication for 3-4 days. If the symptoms of vomiting, diarrhea and weakness of limbs are particularly obvious, it is also necessary to check the ion biochemistry to determine whether there is low potassium and sodium, and if there is, it is necessary to go to the hospital for infusion in time to supplement.