It is not normal for infants to have a bowel movement once every three or four days. It may be related to low intake of food, or it may be a symptom of constipation. Babies should have at least one bowel movement a day under normal circumstances. If a baby has fewer bowel movements than usual and does not have a bowel movement for three days or longer, then parents need to pay attention to it and seek medical attention in a timely manner. 1. Eating less: when infants eat too little, liquid absorption after digestion, less residue to reduce stools, thickening. This leads to less stool discharge. At this time, we need to pay attention to increase the amount of food, and the symptoms will improve. 2. Constipation: The feces of constipated infants should be dry, hard and granular, and the amount is also small. Parents can first give the baby more water, eat more celery, leeks, bananas, pears and other dietary fiber food; at the same time, massage the abdomen, promote gastrointestinal peristalsis; can also be used under the guidance of the doctor bifidobacteria, clostridium casei and other probiotics to regulate intestinal flora, improve intestinal function, can relieve the symptoms. Infants with prolonged bowel movements once every three to four days are advised to seek prompt medical attention and be evaluated or treated by a specialist.