Children always spit up milk may be physiological factors, improper feeding, pathological factors. 1. Physiological factors: younger infants, due to the smaller stomach capacity, and horizontal position, and the baby’s vomiting center development is not too perfect, in the meal after the posture is not appropriate, it is easy to cause spitting. 2. Improper feeding: when feeding the child, the amount of milk is too large, the number of times of feeding is too frequent, and too much gas is inhaled during feeding, all of which will lead to spitting up after the child has eaten milk. 3. Pathological factors: children always spit up may also be related to disease factors, such as pneumonia, meningitis, intestinal obstruction, may also be accompanied by abdominal distension, abdominal pain, fever and other symptoms. If a child is always spitting up and there are other obvious abnormalities, it is recommended to consult a doctor for examination and treatment to avoid serious complications.