These suction pads or suck blisters are usually found on the lips of the infants.They indicate latch difficulty. Babies may have two-toned lips or swollen lips after a latch instead of blisters. Babies get suck blisters from overusing their lip muscle (orbicularis oris). https://www.instagram.com/p/CQ5nl2PBBSW/?utm_medium=copy_linka
This is so painful for babies! Ensuring a good latch whether to a bottle, or breast is the best way to prevent this from happening. If it happens anyway, treat with breast milk, or lanolin. You put it on like chapstick.