1. Why do babies hiccup after feeding? Hiccups occur when the stomach inflates, causing the diaphragm to contract. The baby swallows air when feeding, and the air accumulates in the stomach, causing the stomach to expand, thereby stimulating the diaphragm to contract, causing hiccups. 2. How to prevent hiccups in babies? 1. Let the baby eat in a quiet environment; 2. Maintain the correct position when feeding, so that the baby\’s head is higher than the body; 3.