Pectus carinatum is a chest-wall defect where the breastbone juts forward, creating a “keel” or “pigeon chest.” Most cases are spotted in early teens and worsen during growth spurts.

Chest bump is the headline. The middle of the ribcage sticks out, especially when you stand up straight or take a deep breath.

Tenderness occurs. The raised bone and nearby cartilage feel sore after sports or when pressed.

Posture slumps. Kids roll their shoulders forward to hide the bump, which can lead to back pain over time.

Shortness of breath shows up with activity. You puff faster than friends or feel winded during sports, even though your lungs are healthy.

Heart can race. The chest wall pushes on the heart, so you notice extra beats or a fast pulse.

Late signs include chest pain, fatigue, or self-consciousness that limits activity—an alarm that the deformity is affecting quality of life.