7-month-old babies spitting up, may be gastrointestinal dysfunction, acute gastritis, intestinal obstruction, respiratory tract infection, etc.. 1. gastrointestinal dysfunction: if suddenly eat too much indigestion, abdominal cold, breastfeeding posture, etc., will cause gastrointestinal dysfunction, is the most common cause of baby spit up. 2. Acute gastritis: baby unclean diet, secondary infection, etc., is also the cause of spitting up, mostly accompanied by indigestion and other symptoms. 3. Intestinal obstruction: especially high intestinal obstruction, nausea, vomiting is a common symptom, at the same time there is abdominal distension, the anus stops defecation and so on. 4. Respiratory tract infection: violent cough, upper respiratory tract infection irritation symptoms, can induce the baby vomiting, spitting up. If the baby often spit up milk, need to go to the hospital in time to identify the cause of timely treatment.