1 month old babies can use a pacifier occasionally, but it is not recommended to use it for a long time. When a baby is just a month old, he or she always likes to sleep with the pacifier or wake up when it is taken out, and it is not good to tuck it in. In this case, when parents feel tired, many parents will use a pacifier to keep the baby in a quiet state. But it is important to note that soothers have both soothing and undesirable effects. First, if you give your baby a pacifier for a long time, as your baby keeps sucking, the air will enter your mouth from both sides of your mouth with the swallowing action, and then enter your baby’s stomach, and when your baby’s stomach can’t handle too much milk and air capacity, your baby’s stomach will contract and cause vomiting. Secondly, if the pacifier is used for a long time, from the perspective of dentistry, it may affect the development of the baby’s upper and lower jaws, and also cause the baby to form a high palatal arch, which will lead to a misaligned upper and lower teeth, resulting in an unattractive lip appearance, and may also interfere with the baby’s sucking on the mother’s nipple, which will affect breastfeeding. Finally, when using a pacifier, if you do not pay attention to sanitation and disinfection, it may lead to bacteria entering the baby’s mouth and causing a digestive tract infection. Once a baby uses a pacifier for a long time, it is easy to form habits and dependence that are not easy to quit. Therefore, it is advisable to stop using pacifiers for babies over 10 months of age, and if the baby is really dependent on the pacifier, parents should first observe and analyze the cause before looking for a solution.