Increased stool frequency in babies after breastfeeding formula can be a normal phenomenon, the key is to observe the color and shape of the stool. If the stool is formed, yellow or yellow-green, and does not contain watery or foamy substances, it is considered normal. If the stool is not formed, watery, or has bubbles, it is advisable to be cautious. If the baby is able to eat, drink, sleep well, and is not crying or fussy, there is usually no need to worry; otherwise, if the baby has a poor mental state, is drowsy, or does not want to drink the formula milk, it may indicate illness. In this case, it is important to promptly measure the baby’s body temperature and observe for symptoms such as fever.