The baby keeps hiccuping after taking milk formula, which is considered to be caused by non-disease factors (e.g. eating too fast, low food temperature, etc.) or disease factors (e.g. indigestion, meningitis, etc.). 1. Non-disease factors: (1) Eating too fast: when the baby eats formula, the speed is too fast, which will stimulate the vegetative nerves, thus causing hiccups. (2) Low food temperature: If the baby eats cold milk powder or inhales cold air, it will stimulate the diaphragm spasm and trigger hiccups. 2. Disease factors: (1) indigestion: the baby’s gastrointestinal function is poor, if the abdomen is cold, when eating too full, it will cause indigestion, resulting in the baby appearing to hiccup all the time after eating formula, diarrhea and other phenomena. (2) meningitis: acute inflammation of the cerebral spinal cord membrane caused by viruses, bacteria, fungi and other pathogens, meningitis will stimulate the phrenic nerve, thus causing diaphragmatic spasms, resulting in babies hiccups all the time after eating formula, and can be accompanied by vomiting, crying, mental depression and other phenomena. Babies hiccups after eating formula can be observed for a period of time, if the symptoms are not relieved or accompanied by other symptoms, you need to consult a doctor immediately.