According to What to Expect, babies make strange noises while they sleep, so occasional grunting is normal. When babies grunt at the end of each breath, however, they are trying to clear blocked airways.Continue Reading
What to Expect recommends that parents contact their pediatrician if a grunting sound is part of their baby's typical breathing pattern. Regular nightly grunting noises are sometimes caused by acid reflux, according to Dr. Sears, who writes for Parenting. Medical treatment is required for the excessive stomach acid.
The Journal of Pediatric Gastroenterology recognizes "grunting baby syndrome." Babies with this condition grunt while having a bowel movement. This is not caused by colic. Generally, no medical intervention is necessary.Learn more about Babies & Toddlers