Infants may spit up yellow milk caused by cold, improper feeding, upper respiratory tract infection, pyloric dysfunction, intestinal obstruction, etc. The specific causes need to be clarified and treated accordingly. Common causes and treatment methods 1, cold: infants eating milk into the cold wind, often manifested as spitting yellow milk, and the smell is pungent. Parents should do a good job of keeping the baby warm, such as wearing belly button cotton clothes, bibs, etc., cover the appropriate temperature quilt, to ensure that the room temperature is appropriate, to avoid sudden cold and heat resulting in the baby catching cold; 2, improper feeding: too much milk at one time can lead to stagnation of milk food caused by vomiting, pay attention to a small amount of feeding, after feeding the baby burp and right side lying to avoid vomiting, massage the baby’s stomach to promote intestinal peristalsis, can also be taken orally Probiotics such as yeast to promote digestion; 3, upper respiratory tract infections: influenza can cause infants runny, dry cough, spitting up milk and other symptoms, should promptly go to the pediatrician, the symptoms are not treated, combined with serious bacterial infections can be antibiotics such as penicillin anti-inflammatory treatment under the guidance of doctors; 4, pyloric dysfunction: common in the pylorus is too narrow, causing infants stomach discomfort and spitting up milk, long-term can be due to Malnutrition can cause slow growth, weight loss, etc. It is recommended to go to the hospital to check the diagnosis, available pyloromyotomy treatment; 5, intestinal obstruction: often manifested as crying, vomiting, anal stop defecation or exhaust, such as bile reflux can make the infant spit milk with yellow material, should promptly go to the hospital, treatment using new Stimulus to promote intestinal peristalsis, anal exhaust, serious cases of surgery.