Anorexia in infants usually occurs between the ages of 3-4 months and 6-8 months. Anorexia in infants is a normal physiological phenomenon during the development of infants, which refers to the sudden decrease in milk consumption or the consumption of more and less milk. During 3-4 months of age, infants’ sense of taste gradually develops and drinking the same taste of breast milk or formula for a long period of time may cause infants to have an aversion to milk and not want to drink milk. During 6-8 months of age, infants consume other flavors of complementary foods, and breast milk or formula is no longer the only food for infants. However, the anorexia of infants will not affect the growth and development of infants, so parents should not worry too much and should not force-feed breast milk or formula. In addition, if an infant is reluctant to drink milk during the anorexia period, if he or she also refuses to eat other foods and does not gain weight or even loses weight, parents should pay attention to this and go to the pediatrician in time to rule out pathological diseases.