Pacifier size is too large or due to a long time without replacing the nipple, resulting in the opening of the nipple is too large, etc., sucking will also cause more air bubbles, resulting in the baby in the process of eating milk bottle more and more air bubbles. Baby drinking milk more and more bubbles may also have other reasons, such as the baby due to fun, deliberately drinking milk to blow bubbles, etc., it is recommended to go to the hospital in a timely manner to exclude disease factors, if necessary, to give targeted treatment and therapy.