Girls suddenly loose stools, may be food poisoning, acute gastroenteritis, acute bacillary dysentery due to clinical choice of antidiarrheal drugs, replenishment of electrolytes and water, antiemetic drugs, antimicrobial drugs, etc. for treatment. 1. Acute gastroenteritis: Clinical symptoms of acute gastroenteritis include diarrhea, severe abdominal pain, nausea, vomiting and other symptoms. Generally no special medication is needed, you can rest at home, and should pay attention to replenish electrolytes and water to avoid dehydration and electrolyte disorders. 2. Food poisoning: when girls eat food contaminated by poison, itself contains poisonous and other food, may appear diarrhea, vomiting, sudden diarrhea and so on. This time in the doctor’s guidance to choose antidiarrheal drugs for treatment, commonly used drugs such as montelukast. If the symptoms are serious, gastric lavage is necessary. 3. Acute bacillary dysentery: acute bacillary dysentery is mainly manifested as chills, fever, severe abdominal pain and symptoms of diarrhea. In addition to antidiarrheal and antiemetic drugs, severe symptoms also need to apply antibacterial drug treatment, such as cefoperazone. Sudden diarrhea in girls may also be related to other causes, it is recommended to consult a doctor in time. Note that the above medications should be used under medical supervision.