Pregnancy abdominal pain and diarrhea are often related to physiological and pathological factors, such as cold, improper diet or suffering from gastrointestinal diseases, etc. It is recommended to clarify the causes and carry out reasonable treatment and management. I. Physiological causes: 1. Cold: leads to faster intestinal peristalsis, and then diarrhea, abdominal pain, intestinal flatulence and other symptoms. It is recommended that pregnant women improve the routine stool examination to exclude any infectious factors. In daily life, pregnant women should pay attention to keep warm and avoid getting cold, and can use drugs to protect the gastrointestinal mucosa under the guidance of doctors to maintain the normal function of the gastrointestinal tract. After diarrhea, you can drink yogurt appropriately, take montelukast to stop diarrhea if necessary, or take Bacillus licheniformis live capsules to regulate gastrointestinal function; 2. Improper diet: unclean diet or eating raw and cold food, or taking iron and other drugs that stimulate the intestinal mucosa in fasting situation, resulting in gastrointestinal dysfunction and causing diarrhea. In this case, pregnant women should pay attention to dietary hygiene, and should eat light and easily digestible food, such as millet porridge and noodles. At the same time, they should pay attention to drinking more water to prevent dehydration and avoid eating cold, greasy, spicy and stimulating food. You can take probiotic preparations, such as bifidobacterium, probiotics, etc. to adjust the intestinal flora. Second, pathological factors: If a pregnant woman has some gastrointestinal diseases during pregnancy, such as acute gastroenteritis, which can be manifested as nausea, vomiting, abdominal pain, diarrhea, and in serious cases, fever, dehydration and other systemic symptoms. In this case, pregnant women should go to the hospital in time, under the guidance of the doctor for stool routine, blood routine and other related examinations, and give treatment after clarifying the cause, such as taking montmorillonite, stomach and dietary tablets and other medications as prescribed by the doctor, and apply anti-inflammatory drugs under the guidance of the doctor if necessary.