The anorexia period usually occurs around 4-6 months of age, but some babies may also become anorexic at 3 months of age. During the anorexia period, babies mainly show a decrease in the amount of milk they eat, are reluctant to take the initiative to eat milk, and are resistant to eating milk. However, the baby’s mental state is good and there is no abnormal crying, irritability and other uncomfortable performance. For babies aged 4-6 months, milk aversion may be due to the fact that parents have started to add complementary foods to the baby’s diet and the baby may prefer the taste of complementary foods to milk. Parents should not worry too much about their baby’s nutritional status and induce him/her to eat milk, as it will backfire. Your baby’s nutritional status will not be very bad after adding complementary foods. However, if your baby has milk aversion at around 3 months of age, you should check whether there is a cold and fever, gastrointestinal discomfort and other diseases, and then take appropriate treatment. Anorexia is a common phenomenon, parents should learn to calm the child and pay attention to the baby’s nutritional supplement, which is conducive to healthy growth.