Pregnant women with stomach pain and diarrhea may be due to cold, intestinal infection, irritable bowel syndrome and other reasons, which can be treated by keeping warm, using antibiotic drugs, local hot compresses and other methods. 1. Cold: If a pregnant woman consumes food at a lower temperature, it will irritate the digestive tract and cause stomach pain and diarrhea, at this time, she should pay attention to keep warm and prevent getting cold again, and the symptoms will recover by themselves. 2. Intestinal infections: If pathogen infection occurs in the intestinal tract due to lack of attention to dietary hygiene, acute inflammation may occur leading to stomach pain and diarrhea, and antibiotics such as cephalosporin can be used for treatment. 3. Irritable bowel syndrome: some pregnant women gastrointestinal tract is more sensitive, the digestive tract nerves are too tense, you can promote the relaxation of abdominal neuromuscular through massage, local hot compresses and other methods to alleviate the symptoms of tummy ache and diarrhea. If pregnant women have stomach pain, diarrhea and other conditions, you need to consult a doctor in a timely manner, under the guidance of the doctor to take appropriate methods of treatment, to promote the alleviation of symptoms.