1. Causes of baby bellyache Baby bellyache refers to the situation where the baby feels discomfort or pain in the abdomen. This situation is very common, but it makes parents very worried. There are many causes of tummy ache in babies, including dietary issues, digestive issues, allergies, and more. 1. Dietary problems Since the baby\’s digestion is not fully developed, eating problems are prone to occur. If your baby eats too much or too quickly,