Infant spitting is not always a disease, it may be physiologic, but if if persistent, it may be related to respiratory or digestive system diseases. In general, infants may spit due to immaturity of the central nervous system and salivary glands. This is normal and not a disease. However, if the phenomenon persists and tends to worsen, it may be due to pneumonia, etc., and may be accompanied by coughing up phlegm, fever, etc. However, it may also be due to digestive problems such as indigestion. However, it may also be due to digestive diseases such as indigestion, which causes increased secretion of gastric juices, and may also show the symptom of spitting, which may be accompanied by loss of appetite and abnormal bowel movements. There are many reasons for babies to spit up, which may or may not be a disease. It is recommended to go to the hospital in time for diagnosis, and if it is caused by disease, it needs to be treated actively so as not to delay the condition.