What is the most common source of chest pain in children?

The most common source of chest pain in children is indeed musculoskeletal (MSK) related issues. This is largely due to the fact that children have developing bodies and are often active, which can lead to muscle strain or injury. Conditions such as costochondritis, which is the inflammation of the cartilage that connects a rib to the sternum, are frequent culprits for causing chest pain in this age group.

Musculoskeletal pain is typically characterized by tenderness upon palpation, and it may worsen with movement or certain positions, which helps differentiate it from more serious cardiac conditions. Children may also experience chest pain due to postural issues or after engaging in physical activity, which are common scenarios in pediatric populations.

While cardiac issues can occur, they are much less common in children compared to adults, and similarly, pulmonary conditions, while they can cause discomfort, tend to present with additional symptoms like difficulty breathing or wheezing. Gastrointestinal disorders can also lead to chest pain but usually present alongside symptoms such as nausea or abdominal discomfort. Therefore, when evaluating chest pain in children, musculoskeletal causes are often the first consideration due to their prevalence and the nature of the symptoms.