Or intolerance etc. did you get this officially tested and how? Ds as a baby has lactose intolerance dx after discussion and trial and error with gp. Lots of fake milk etc. five years later I have out together the recent eczema, tummy aches and have come to the conclusion that it may have returned. After a longish period of checking tummy at gp, checking for Urine infections, skin conditions all coming to nothing it makes sense. ESP after this am when he told me not to drink milk as it caused awful pains in your tummy! Shame he didn't mention this earlier!