Childhood pectus carinatum is a common clinical condition, primarily caused by a deficiency in vitamin D leading to metabolic bone disease. Its characteristics are mainly manifested by the protrusion of the sternum and flattening of the chest walls on both sides. There are several treatment methods available: First, supplement children with calcium tablets and vitamin D, promptly administer these medications, and encourage exposure to sunlight and outdoor activities during the growth process, which is beneficial for bone calcium absorption. Additionally, the child should wear a brace specifically for pectus carinatum. The brace compresses the chest cavity, causing it to protrude upward. After wearing the brace for a period, the protruding chest can show improvement. If previous treatment methods are ineffective and severe sternal deformities still occur, surgical treatment at a specialized hospital may be necessary. In daily life, the child should be cautious about their posture and body position, avoiding rolling, bending, and similar actions as much as possible to facilitate a quicker recovery.