Is it normal for newborns to hiccup? Hiccups in newborns are a common phenomenon that many new parents encounter. Hiccups are often caused by swallowing too much air, gas in the stomach, or intestinal problems. Let’s take a look at some of the causes of hiccups and how to effectively relieve hiccups in newborns. The reason is first of all, the respiratory system and gastrointestinal system of newborns