My nephew was is a similar situation with his eczema flaring up with different foods, his dad is a herbalist and got a blood sample sent off to the usa for testing and came back with similar type of results ranging from not so allergic to very allergic, he is now 13 so takes some responsibility in what he eats but was gluten, egg, dairy, high acid foods, honey, wheat were all in the high catagory, he also had a reaction to apples.  I also found out by defult that Anastasia reacts to egg whites very badly but she can eat the yolks, she is also old enough to tell me that the whites tasted yuck with a very funny look on her face.  We also found it interesting that my nephew could eat Oak Baked Beans but not Watties as there was an extra additive.

Good that so far it has only reacted with her skin and hasn't been life threatening, hopefully she will grow out of most of them