There is no relationship between diarrhea and pregnancy. However, the illusion of diarrhea may occur after pregnancy. What is the illusion of diarrhea? It is acute diarrhea in which the stools are often unshaped, thin, or have some mucus or pus and blood in them. If the stool is only more frequent, but not accompanied by obvious changes in shape, it is likely to be caused by the backward pressure of the uterus on the rectum after pregnancy, which may lead to frequent urination and increased frequency of stool, because it presses on the neighboring organs and causes diarrhea, which cannot be called real diarrhea. If the diarrhea is not relieved by self-treatment, it is recommended to consult a hospital for a stool test, unless it is caused by other diseases.