Physiological milk aversion is a special physiological phenomenon in the development of babies, referring to a phenomenon in which babies suddenly appear to eat significantly less milk or sometimes more and sometimes less milk at around 4-6 months after birth. This phenomenon is mainly caused by the fact that as babies develop, their curiosity about things in the outside environment increases and they are easily distracted during the process of breastfeeding. Although the baby’s feeding volume is significantly reduced, the baby’s physical development is not affected, and there are no symptoms such as abdominal pain, diarrhea, nausea, vomiting, etc. The baby’s mental and sleep status is good, and after a period of time, it can generally return to normal on its own.