Infants with GERD usually have symptoms such as vomiting, spitting up and overflowing of milk, respiratory tract infections, and so on. 1. Vomiting: GERD in infants is usually caused by immature development of the cardia and small stomach capacity of infants, which will easily cause GERD, usually occurring in infants less than 6 months old and within 1 hour after eating. 2. Spitting up and overflow of milk: after eating milk, babies can appear to spit up or overflow of milk. It is manifested as milk spitting out from the mouth and nasal cavity or overflowing from the corner of the mouth. This situation can be appropriate to the baby burp, can be relieved. 3. Respiratory infections: In addition to digestive symptoms, there may also be respiratory symptoms, such as choking, shortness of breath, which can lead to aspiration pneumonia, and in severe cases, it is also easy to accidentally attract suffocation and so on. It is recommended that infants with vomiting and other symptoms of discomfort should be taken to the hospital in a timely manner to do a checkup, and then under the guidance of the doctor for treatment.