Some people cannot have any dairy products at all yet some can tolerate cheese, yogurt but no
milk (Some people can tolerate skim
milk but not whole
milk). Most people with lactose intolerance have loose bowels to diarrhea after eating dairy products and have mild to severe (depending on how much they eat) abdominal pains. Suggest having your son tested by an Allergist so you know if he has an allergy or just intolerance.