Infants spitting up milk from the nose may be caused by physiological factors, including imperfect development of the infant’s digestive system and improper breastfeeding, or pathological factors, including congenital pyloric hypertrophy, gastritis, etc. Physiological factors: 1. The infant’s digestive system is not well developed: including relaxation of the lower esophageal sphincter, tension of the pyloric sphincter, and imperfection of the cardia sphincter. The stomach of infants is usually horizontal and has a small capacity, which can easily lead to spitting up milk from the nose when crying or changing position during breastfeeding. This phenomenon is physiological spitting up, no special intervention is needed, but attention should be paid to avoid crying and changing the baby’s position during feeding to reduce the occurrence of such symptoms; 2. Improper breastfeeding: the mother’s milk is sufficient, the flow of breast milk is too fast, and the baby swallows untimely, easily choking and coughing, which leads to spitting up or spitting out from the nose. The breastfeeding position can be adjusted appropriately, and when there is too much breast milk, some of the milk can be sucked out through a breast pump before breastfeeding, which can reduce the occurrence of such symptoms. Pathological factors: 1. congenital pyloric hypertrophy: due to the pyloric muscle hypertrophy and edema caused by the output tract obstruction, can be manifested as jet vomiting, vomiting milk from the nose, usually accompanied by jaundice, can be treated with pyloromyotomy; 2. gastritis: the infant resistance is low, when the gastrointestinal infection can cause gastritis, manifested as nausea, vomiting and other symptoms, and then appear spitting milk from the nose. The situation. You can take probiotics to promote gastrointestinal peristalsis and regulate intestinal flora as prescribed by the doctor. 3. It is recommended to take the infant to the hospital in time for diagnosis through imaging, which usually requires treatment through medication or even surgery.