Three months the baby does not poop smelly farts may be related to the baby stool pattern change, indigestion, constipation, etc., the mother can properly feed the baby more water, adjust their diet, in the breast milk to add vegetable juice and other methods to relieve the symptoms of the baby does not poop smelly farts. 1. baby stool pattern change: commonly known as save belly, when the baby gradually grows up will be on the breast milk digestion, absorption more fully, produce less food residue to stimulate the rectum is not enough to produce defecation reflex. When the baby appeared to save the phenomenon, the mother can feed the baby in the middle of the two milk drink some water, so as to relieve the baby does not poop and fart symptoms. 2. indigestion: if the baby fart frequency is more frequent, and not poop, may be imperfect with the gastrointestinal function, indigestion, can be prescribed to probiotics regulation, such as bacillus subtilis bacillus granules. 3. constipation: when the three-month-old baby does not poop and fart, may be related to constipation. At this time, the mother can add vegetable juice in the milk to feed the baby, promote the baby’s intestinal peristalsis, relieve constipation. When the baby does not poop and put stinky farts, should promptly seek medical attention, by professional doctors to clarify the diagnosis and treatment.