The chest pain that your son complains about is probably due to a condition known as the Da Costa syndrome. This is due to intermittent spasm of an artery on the inside of the front part of the chest known as the internal mammary artery. It is not caused by anything to do with your son's heart. This pain is usually due to stress and even though your son does not appear to be the usual type of child who develops this condition his symptoms are still very suggestive of the Da Costa syndrome. Children usually grow out of this problem with time. They need reassurance when the pain starts . It is not necessary to give anything for the pain. It would probably be best to check with your doctor that this is indeed your son's problem, but it seems reasonably certain that this is the cause of his pain.
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