I agree that most 'aligments' we have are directly related to our diet or environmental exposures ... so if the child is struggling I would suggest the elimination diet as well ~ eliminate ALL the major / common food allergens for a month and see if his symptoms disappear ... so dairy / gluten / nuts / soy / fish / etc ... and than reintroduce them back in 1 at a time over two week period and if the symptoms return by the end of that two week period when something is reintroduced than you know THAT is a trigger and to keep it out of their diet ... sometimes it is a combination of things ~ for example most people with gluten intolerance are also dairy intolerant at least until the digestive track heals than they might tolerate some dairy!