Eating folic acid during pregnancy generally will not have diarrhea, diarrhea may be caused by other reasons, such as intestinal spasm, enteritis and other reasons. 1. Intestinal spasms: when the abdomen is cold, can cause intestinal spasms, causing intestinal peristalsis to accelerate and thus cause diarrhea, the most common in the summer blowing air conditioning, fans, etc., or usually too little abdominal clothing, too much cold food, etc., you need to drink plenty of hot water, eat a light diet, and if necessary, take oral probiotics to improve diarrhea. 2. Enteritis: generally after eating unclean food, infected with bacteria and other pathogens can cause enteritis, diarrhea, abdominal pain, fever and other symptoms, need to consult a doctor in time, under the guidance of the use of drugs to fight infection. Diarrhea during pregnancy do not blindly self-medication, so as not to hurt the fetus, should be under the guidance of the doctor reasonable use of medication.