The child vomiting should first confirm that it is spitting up or vomiting, small infants due to the special physiological structure of its gastrointestinal tract, in the more milk or swallow more air, easy to appear from the corner of the mouth a small amount of milk overflow, this is a normal milk overflow, is not pathological, small months old baby has more serious overflow of milk, at the same time, there is obvious crying, farting more manifestations, need to be vigilant about lactose intolerant or milk protein allergy and other problems, and if the child is more obvious and frequent ejection vomiting, some children may be from the mouth or even nostrils spraying milk. If the child has frequent and obvious projectile vomiting, some children may spit milk from the mouth or even from the nostrils, it is necessary to take into account the age of the child and the frequency of the vomiting to help determine the cause of the disease. The first thing that needs to be ruled out in a small child is a structural abnormality of the gastrointestinal tract, such as congenital hypertrophic pyloric obstruction or gastric torsion, which needs to be confirmed through a physical examination by the doctor as well as ultrasound and other imaging tests. In older children, gastroesophageal reflux (GERD), gastrointestinal infections, and neurological disorders should be considered, all of which need to be analyzed in conjunction with the child’s other symptoms, and the cause of the problem clarified before considering how to handle it. If it is milk overflow, generally pay attention to avoid inhaling too much air, more burping and other methods, can be relieved, if it is vomiting, structural abnormality needs surgical treatment, if it is infected and other causes of vomiting, generally need special treatment, do not need to use antiemetic drugs, give fluids to ensure that the amount of intake, wait and observation can be.