Pectus carinatum, commonly referred to as pigeon chest, is a manifestation of the skeletal sequelae of rickets in children, where the sternum protrudes outward. To examine for pigeon chest, one commonly uses the hand to feel from top to bottom; if the sternum is noticeably protruding from the surface, then pigeon chest may be considered. This condition is a sequelae caused by a deficiency of Vitamin D. If this is the case, it is essential to visit a pediatric care, growth and development, or general pediatric outpatient clinic, where a pediatrician can confirm the diagnosis. If pigeon chest is confirmed, blood tests to measure Vitamin D levels should be conducted for infants. For older children, appropriate calcium supplementation and exercises to expand the chest should also be considered.