1. What are the causes of hiccups in babies? Hiccups in babies are caused by a buildup of gas in the gastrointestinal tract and usually require no special treatment. However, if it occurs frequently or lasts for a long time, it may require attention. Causes of hiccups in babies may include: 1. Feeding too fast: When babies nurse, they swallow a lot of air. This gas can eventually build up in the gastrointestinal tract, causing burping. 2. Overeating: If your baby eats too much or too frequently, it may cause hiccups. 3. Digestive problems: If the baby’s digestion is not mature enough,