Babies always spit out water, most with the oral cavity capacity is relatively small, gastrointestinal dysfunction and abdominal cold related. Two months after the birth of the baby, oral salivary glands normal secretion of saliva, but the oral cavity capacity is small, swallowing function is not mature, can not produce all the saliva swallowed into the gastrointestinal tract, it is easy to vomit water. When gastrointestinal dysfunction occurs, it will lead to excessive gastric secretion or increased oral salivary secretion, causing vomiting, which will be accompanied by nausea, vomiting, abdominal pain, abdominal distension, and diarrhea. When the abdomen is cold, it is also easy to cause gastric acid stimulation secretion caused by excessive vomiting. Babies always spit up water, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.