Pregnant women will experience a series of early pregnancy symptoms in early pregnancy, but under normal circumstances, diarrhea will not occur. If diarrhea occurs in early pregnancy, the pregnant woman should observe the degree and frequency of diarrhea. If the diarrhea is transient, there is no need to worry excessively; mild diarrhea will not affect the pregnancy. Patients are advised to observe the changes in diarrhea and pay attention to the usual diet structure as well as dietary nutrition to avoid consuming unhygienic food, which can cause diarrhea. If a pregnant woman has severe diarrhea in the early stages of pregnancy, it is recommended that she immediately consult a local hospital for laboratory tests to rule out acute inflammation of the gastrointestinal tract and other organic lesions, as well as rehydration and other treatments to avoid shock due to severe diarrhea. If the diarrhea during pregnancy is infected by specific pathogenic microorganisms, the pathogenic microorganisms may enter the fetus through the placenta and cause abnormal intrauterine development. Once severe diarrhea occurs during pregnancy, it is not recommended that pregnant women be treated at home under observation. This is because, when diarrhea becomes severe to a certain extent, there is a possibility of triggering miscarriage. Therefore, diarrhea can occur in the early stages of pregnancy if the diet is not hygienic, and pregnant women are advised to pay attention to a healthy diet in general.