Possible causes of flatulence in infants after eating complementary foods include gastrointestinal dysplasia, indigestion, improper feeding of complementary foods, etc. Treatments include general treatments, medications, and so on. 1. Gastrointestinal dysplasia: Because of the imperfect development of the gastrointestinal tract in small infants, gastrointestinal dysfunction can easily occur after the addition of complementary foods, resulting in flatulence, abdominal pain, etc. It is recommended that infants be a little older before adding complementary foods to their diet. It is recommended that babies be a little older before adding complementary foods. 2. Indigestion: After feeding complementary foods, if the baby has indigestion, there can also be flatulence and other manifestations, you can take compound pepsin and other digestive drugs to alleviate the symptoms of abdominal distension. 3. Improper feeding of complementary foods: If you eat more gas-producing complementary foods such as radish, soy products, etc. may also appear bloating performance, it is recommended to add complementary foods to the baby should be added selectively to avoid the above situation. In addition to the above reasons, pediatric enteritis, intestinal obstruction and other diseases can also appear bloating performance. It is recommended to go to the hospital if the above symptoms occur, under the guidance of the doctor to carry out regular treatment. The above mentioned drugs should be applied under the guidance of a doctor, avoiding self-medication.