Frequent diarrhea in late pregnancy:1. With or without food poisoning: It is an acute toxic disease caused by eating contaminated with bacteria as well as other toxic substances or ingesting undercooked lentils, etc. Consumption of spoiled food, contamination of water sources mainly by unclean utensils, in addition to bacterial infections. People may develop enteritis or dysentery after eating food infected with bacteria such as E. coli, Salmonella, Shigella, or drinking beverages contaminated with bacteria, resulting in symptoms of diarrhea, vomiting, shortness of breath, and fever. 2, viral infection: the human body is susceptible to viral diarrhea after being infected with a variety of viruses through food or other means, such as infectious rotavirus or coxsackievirus, with abdominal pain, diarrhea 3, indigestion: summer irregular diet, eating too much, eating food that should not be digested or due to insufficient gastric power caused by food in the stomach stagnation caused by bloating, diarrhea, nausea, vomiting.