An introduction to the causes and solutions of three-month-old babies spitting up milk. As the baby grows, various problems also arise. Spitting up milk is one of the problems that makes many mothers very confused, especially when the baby is three months old. common. Below we introduce the common causes of babies spitting up milk and corresponding solutions from four aspects. Reason 1: The baby sucks milk too fast. Many babies mouth very quickly when feeding, which will cause