One-month-old babies spit up frequently, the causes include physiological factors and pathological factors, it is recommended to consult a doctor in a timely manner to identify the cause, the cause of treatment. 1. Physiological factors: one month baby gastrointestinal function development is not perfect, too much milk, too fast, or eating milk in the process of inhaling a lot of air, will cause the baby spit up. Can be in the baby after eating milk, let the baby lying on their own, pat the baby’s back, to promote hiccups, help relieve the phenomenon of spitting up. 2. Pathological factors: dyspepsia, congenital megacolon, necrotizing small bowel colitis and other pathological factors can also lead to frequent spitting up of one-month-old babies. A one-month baby frequent spitting up, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.