1. Causes of bloating in infants 1.1 Immature digestion 1.2 Overeating or improper feeding 1.3 Abdominal bloating caused by gas accumulation Infant bloating refers to the swelling of the baby’s abdomen, usually accompanied by a large amount of gas accumulation and discomfort. This condition is common in newborns and infants, but is still a cause for concern for parents. Here are some possibilities