Pediatrician Dr. Wendy Sue Swanson and occupational and feeding therapist Lynn Wolf, MOT, OTR, IBCLC, discuss tongue ties and some challenges that can come up for babies feeding. A tongue tie is when a baby’s tongue does not completely separate from the base of the mouth during development, which can limit the movement of the tongue. Tongue ties can affect the baby’s ability to feed due to challenges with latching and/or sucking, but not all the time.