A pacifier is a rubber, plastic, or silicone device designed for infants to suck on. It can provide comfort and help soothe babies, especially during teething or when they are fussy. Many parents use pacifiers to help their children self-soothe and fall asleep more easily. While pacifier use can be beneficial, it is important to monitor how long and how often a child uses one. Prolonged use may lead to dental issues or affect speech development. Pediatricians often recommend limiting pacifier use after a certain age to encourage healthy oral and social development.