The treatment principles for diarrhea in pregnant women are the same as those for diarrhea in the normal population, which are to actively correct dehydration and maintain water-electrolyte balance, followed by symptomatic treatment according to the cause. Because pregnant women are a special group of people with poor resistance, their condition can be heavier, and drug treatment may affect the fetus, and because pregnant women may have severe gastrointestinal symptoms such as nausea and vomiting in combination, treatment is more difficult than for the general population. Oral rehydration salts are preferred for rehydration treatment, but if oral rehydration is not possible due to severe vomiting symptoms, intravenous rehydration therapy is required. For infectious diarrhea due to bacterial infection, etiological treatment mainly uses cephalosporins, such as ceftazidime, cefotaxime, ceftriaxone, etc. Antibacterial drugs such as quinolones and tetracyclines are prohibited, so such drugs may have an effect on the fetus. If the infectious diarrhea is caused by viral infection, the condition is self-limiting without etiological treatment, and antiviral drugs such as ribavirin are prohibited, which may lead to fetal malformation and miscarriage. In addition, diarrhea in pregnant women is more likely to lead to complications such as infectious shock, hypovolemic shock, etc. If combined with recurrent high fever or diarrhea symptoms are severe, prompt hospitalization is required. In conclusion, diarrhea in pregnant women is more risky than diarrhea in the general population, and the medication needs to take into account the effects on the fetus, so it is best to use the medication under the guidance of a specialist.