A full-term baby who has not pooped for two days is a common clinical symptom that needs to be considered in a comprehensive manner. It may be a normal phenomenon, or it may be caused by functional constipation. Just a month old baby, if two days without defecation, but the baby’s mental state, breastfeeding, etc., all aspects are normal, it is recommended to closely observe, considered a normal performance, generally do not need special treatment. It is recommended to increase the amount of drinking water, rubbing hot hands to the baby’s abdomen clockwise kneading, conducive to gastrointestinal tract peristalsis, can help relieve the symptoms. Also pay attention to the body of the cold warm, avoid catching cold. Full-month baby if three days no stool, poor mental state, poor appetite, but also consider whether it is related to functional constipation, you can go to the hospital pediatric internal medicine department for examination, to understand the cause. If necessary, you can combine with the doctor’s advice to regulate, so as not to further aggravate the baby’s symptoms.