There are four main hazards of using a breast pump: first, when using a breast pump, improper suction control can cause nipple cracking, such as improper care, leading to bacterial invasion and, in severe cases, acute mastitis. Secondly, preventing the baby from sucking directly on the nipple and reducing the stimulation of the nipple may lead to lower lactogen and insufficient milk secretion. Third, lowering the temperature of the milk sucked with a breast pump, which needs to be heated when the infant is hungry, may lead to the loss of certain nutrients. Fourth, cutting off the direct contact between the baby and the mother is not conducive to fostering a bond between mother and baby. During breastfeeding, it is recommended to feed personally. If there are other reasons such as nipple entrapment that require the use of a breast pump, you should also use it intermittently, moderately let the baby suck on the nipple to promote milk evacuation, and pay attention to cleaning the breast pump to keep it clean and dry to avoid bacterial residue that can lead to diarrhea discomfort in the baby.