The full-month baby appeared not defecate fart odor phenomenon, mostly considered to be indigestion caused by delayed defecation. It is recommended to feed the baby some water, moisturize the intestinal tract, and gently clockwise massage the baby’s abdomen to promote the baby’s intestinal peristalsis, so as to improve the baby’s indigestion phenomenon. Due to the baby’s age, the digestive system is still not well developed, if you do not eat enough or overfeeding, cold, etc., may lead to the baby indigestion, spleen and stomach disorders, which in turn cause delayed defecation fart odor phenomenon. It is recommended that mothers should pay attention to strengthening the baby’s feeding, breastfeeding on demand, but also pay attention to the baby’s care, and avoid the abdomen from getting cold when changing the baby’s diaper. If the baby frequent delayed defecation, fart smell phenomenon, also does not rule out the possibility of gastrointestinal inflammation, intestinal developmental abnormalities, etc., at this time to take the baby to the hospital pediatrics, to further clarify the specific causes of the disease, to give the appropriate treatment.