The baby has not pooped for 4 days and always farting is considered to be caused by physiological factors (digestive system continues to improve) or pathological factors (such as constipation, etc.), through general treatment, medication, etc., to improve the symptoms. 1. Physiological factors: as the baby’s digestive system continues to improve, the baby’s gastrointestinal absorption function will gradually increase, therefore, the daily production of food residue is very small, which can lead to the baby appeared 4 days without poop always fart phenomenon, but the baby’s mental state is good, no other discomfort. At this time, no need to worry, and so on the accumulation of food residues to the amount, will naturally defecate. 2. Constipation: If the baby is constipated, it will also lead to the baby not pooping for 4 days, abdominal pain, dry stools are not easy to discharge and other symptoms, and will be accompanied by the phenomenon of farting. Parents can massage the abdomen to assist in promoting intestinal peristalsis, stimulate the perianal area to induce defecation, if the symptoms are not relieved, you can use lactulose oral solution, Kaiser Permanente, etc., for treatment. There are many other causes of farting in babies who haven’t pooped for 4 days, so it is recommended that children seek medical attention to exclude physiological factors and receive treatment as soon as possible. The above medications should be used in accordance with medical advice.