Under normal circumstances, babies will experience diarrhea, constipation, bloating and vomiting during the transfer process, and generally have adverse reactions during the first 3-5 days of the transfer. The change of milk is the result of your baby reaching a certain stage of growth and needing to change the way he or she feeds, or changing the use of formula because the formula segments are different. It is a slow process and babies need a period of time to adapt to the change, usually 1 week after the change. Adverse reactions include: 1. diarrhea, some milk powder is not suitable for the baby’s physical development, so during the transfer period if the milk powder is not properly selected can cause diarrhea in the baby; 2. each milk powder added ingredients are different, the baby after eating a certain milk powder constipation, this is usually a problem during the transfer period, suggesting that the milk powder is not adapted to the baby’s growth and development or too fast; 3; 3, bloating, some milk powder ingredients turn too fast will have a certain impact on the baby’s digestive function, the release of gas, resulting in bloating and other phenomena. If the baby has a serious digestive reaction, diarrhea, constipation, bloating, suggesting that this formula is not suitable for the baby’s physical development, it should be recommended to replace another formula. It is recommended that after the baby has an adverse reaction, you can take dry yeast tablets and vitamin B1 as prescribed by the doctor to improve the function of the gastrointestinal tract for further adaptation of the child, and parents should not be in a hurry.