BEST CHILD SPECIALIST DENTIST IN CHENNAI! Pacifiers can help quiet a fussy baby, but they also teach your baby to self-soothe through their natural sucking reflex. Just make sure the pacifier is BPA-free. BPA stands for Bisphenol A, a chemical found in polycarbonate plastics. There is growing concern that BPA can affect the brain and certain hormones in children and infants. Many believe that pacifiers make it easier to break the sucking habit as the child matures.