Burping spit up is usually due to gas discharge, drinking too much milk and improper burping. 1. Gas discharge: If there is only a slight spitting up during the burping process, it is usually caused by gas discharging from the digestive tract when burping. Usually, it is caused by the gas coming out of the digestive tract when burping, which brings out the milk that the baby has just eaten. 2. Drinking too much milk: When the baby drinks a lot of milk, the gastrointestinal tract is in a full state. If you burp the baby at this time, the milk in the baby’s small capacity of the gastrointestinal tract agitation, it is easy to cause the phenomenon of spitting up. 3. Burp inappropriate: If parents burp the baby too hard, stimulate the baby’s gastrointestinal tract spasm, or posture is not right, pressure to the baby’s abdomen, these situations may cause the baby spit up. Burp spit up may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.