Frequent hiccups in newborns may be a normal physiological phenomenon, or it may be caused by indigestion, acute gastroenteritis and other reasons. 1. Physiological phenomenon: due to the immature neural development of newborns, the nerve reflexes are not fully established and can easily cause diaphragmatic spasms, which may show frequent hiccups; it is mostly considered that it may be caused by too fast breastfeeding, inhaling more cold air and other reasons. 2. Indigestion: If there is improper feeding, such as frequent breastfeeding, or feeding too much milk at one time, it will easily lead to indigestion, resulting in weakening of the spleen and stomach function, which may cause diaphragmatic spasm, and frequent hiccups may occur, which may also be accompanied by bloating, crying and other manifestations. 3. Acute gastroenteritis: for example, newborns drink contaminated milk powder, it is likely to induce acute gastroenteritis, under the stimulation of inflammation, may cause diaphragmatic spasm, resulting in frequent hiccups, may be accompanied by abdominal pain, diarrhea and other manifestations. Frequent hiccups in newborns may also be caused by other reasons, if accompanied by obvious discomfort, it is recommended to consult a doctor as soon as possible to diagnose the cause and give targeted treatment.