The common causes of intestinal flatulence in newborns include physiological factors, such as immature intestinal development, improper feeding, pathological factors such as enteritis, etc. The specific analysis is as follows: 1. Physiological factors: immature development of the gastrointestinal digestive system in newborns, lactase deficiency, food in the digestive tract through the role of intestinal bacteria and other digestive enzymes and fermentation gas production and the formation of flatulence. 2. Improper feeding: breastfeeding mothers eat some easily flatulence food such as high starch, high sugar food, or overfeeding, will increase the burden on the intestinal tract of newborns, resulting in intestinal flatulence. 3. Enteritis: infected by external germs, fever, diarrhea, vomiting and other gastrointestinal disorders can occur, which can easily lead to intestinal flatulence. Newborn intestinal flatulence may have other reasons, it is recommended to go to the hospital in time for relevant examinations, clear causes and active symptomatic treatment.