Common causes of diarrhea in early pregnancy include unclean diet, cold stomach and intestinal tract, bacterial infection, etc. The causes are different and the treatment is different. 1. Unclean diet: Pregnant women with unclean diets often suffer from indigestion, resulting in diarrhea. At this time, you should promptly adjust your dietary lifestyle, reduce the intake of cold and irritating foods, drink more water, eat more porridge and other easily digestible foods, so as to alleviate the digestive burden on the gastrointestinal tract and gradually improve the symptoms. 2. Gastrointestinal cold: some pregnant women have diarrhea due to gastrointestinal cold, this cause can pay attention to warmth, generally can be relieved by themselves. 3. Bacterial infection: If the diarrhea is serious, you need to consider whether it is a bacterial infection caused by acute gastroenteritis, to see the obstetrician and gynecologist immediately, do not self-medication. Pregnant women had better go to the hospital to check the cause of diarrhea, and then for the cause of treatment. At the same time, it is recommended that pregnant women usually pay attention to dietary hygiene, do not eat spoiled and expired food, avoid spicy and stimulating food, such as chili peppers, mustard and so on.