Abdominal pain and diarrhea in the sixth and a half month of pregnancy suggest the possibility of acute gastroenteritis, and a gastrointestinal cold cannot be ruled out, which requires a stool plus routine blood test at the hospital to clarify. After the diagnosis of acute gastroenteritis, you need to first regulate through diet and intestinal probiotics. Diet does not eat spicy, fried, raw and cold and other stimulating foods, you can drink some thin rice, lean meat porridge. If the effect is not good, treatment with antibiotics such as cephalosporin III can be considered. If the patient’s performance is clearly gastrointestinal cold, symptomatic treatment is needed, depending on whether the patient has a fever and the degree of fever, which can be treated with antipyretic drugs when it exceeds 38.5 degrees. When diarrhea symptoms are more severe, treatment with antispasmodic and antidiarrheal drugs, such as 654-2 plus montelukast, is needed.