The symptoms you describe with your son may just possibly result from a food allergy.A food allergy results from the food setting off a reaction involving the immune system.The reaction does not have to be as serious as anaphylaxis but can simply show up as vomiting the food or having diarrhoea.Your son is an allergic little boy as he has asthma and allergic rhinitis but in spite of this food allergies are unlikely. This is because the RAST for milk and other foods were negative. More likely is a food intolerance such as lactose intolerance. Here there is a defect or inability to digest the milk sugar called lactose which is present in milk. Lactose intolerance is very common and affects at least 10% of children in this country.It would be worthwhile putting your son on a completely dairy free diet for at least 3 days to see if he improves.Substitute soya milk and soya yoghurt for the dairy products.
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