Spitting up may be caused by pneumonia, intracranial infection, gastroesophageal reflux and other diseases. If a small amount of spitting up, and the baby’s spirit is good, you can temporarily observe and follow up the treatment, if necessary, seek medical treatment. If the breastfeeding position is wrong, it may cause the baby to inhale too much air, which may easily lead to the occurrence of gastroesophageal reflux due to the imperfect development of the baby’s cardia. This leads to spitting up. In addition, younger babies, if suffering from pneumonia, clinical symptoms are often atypical, can simply manifest as shortness of breath, spitting up milk, spitting up bubbles, choking, etc., you can improve the chest X-ray to assist in the diagnosis. Intracranial infection due to intracranial hypertension can lead to the occurrence of projectile vomiting, which can appear spitting up. If the baby spit up performance, more frequent, it is recommended to consult the examination, clear diagnosis in the doctor’s guidance for targeted treatment.