Spitting up all the time may be caused by physiological reasons, improper feeding, gastroesophageal reflux and so on. 1. Physiological reasons: Because babies are small, their stomachs are immature, and their stomachs are horizontal, if they eat more milk, they will easily spit up frequently. 2. Improper feeding: If the baby eats too fast, he or she will swallow a lot of air, which will also lead to spitting up. 3. Gastroesophageal reflux: It may be due to the presence of gastroesophageal reflux in infants, as the stomach contents reflux into the esophagus after feeding, thus causing spitting up, which is often accompanied by loss of appetite and slow growth. Parents must pay attention to the feeding style, avoid letting the baby eat too fast, if the symptoms continue to be unrelieved, you need to take the baby to the hospital.