The causes of spitting up are both physiologic and pathologic. Physiological causes are mainly caused by improper feeding, generally pay attention to the feeding method; pathological causes include gastroesophageal reflux, lactose intolerance, intussusception, etc. Treatment includes medication (e.g., domperidone, lactase), enema treatment, etc., and even surgical treatment. 1. Physiological causes and treatments: such as breastfeeding too quickly, too fast, lying down after breastfeeding, etc. It can be relieved by controlling the feeding time and feeding speed, burping after feeding, elevating the head of the bed and lying on the side. 2. Pathological causes and treatment: such as gastroesophageal reflux can be given domperidone, probiotics and other drugs; such as lactose intolerance can be given lactase or lactose-free milk powder; such as intestinal intussusception, intestinal torsion, etc. may need to be given air enema treatment, surgical treatment and other ways. For the cause and treatment of spitting up, it is recommended to actively seek medical advice and consult a doctor.