Hi M.,
I've done quite a bit of research into food intolerance issues. Things for you to be aware of:
1. The negative Celiac blood test done on your son is unreliable. My blood test was also normal. I had MASSIVE disease process going on. This is a terrible crisis in GI healthcare, since it gives people like you a false sense of security that you have adequately eliminated that as a culprit. I assure you that you have not. A better option is a STOOL test, through Enterolab in Plano. www.enterolab.com. No doctor referral needed. Order test kit, send in specimen, they email you the results. Easy Easy Easy. Read this article by Dr. Fine to explain why conventional GI doctors miss the boat on this issue time and time again and why the stool test is better. https://www.enterolab.com/StaticPages/EarlyDiagnosis.htm
Here is another interesting article on the issue of the need to revise the conventional diagnosis standards:
http://www.celiac.com/articles/21596/1/Is-it-Time-to-Revi...
2. You can also test for other things, especially casein, through Enterolab. Casein is the protein in dairy. Rashes, in particular, are notoriously connected with dairy. www.enterolab.com. Cannot recommend this lab enough.
3. You can try an elimination diet as a cheaper alternative, but this is (a) difficult to do for a long enough period of time, especially for kids and (b) hard to identify connections, since the whole problem with "hidden" food intolerances is that they are difficult to see and connect to the offending food.
4. Be careful of ANY conventional GI doctor advice on this issue, even if they are from Children's Medical Center and seem to be the "best in the business." Doctors don't study nutrition in med school. Their knowledge is extremely limited, unless they have taken it up as a side hobby. Did you see the cover page article in the Dallas Child Magazine this past spring about the little boy who had major food intolerance issues and his GI physician father was rather "surprised" and "enlightened" by the whole discovery of how much food can actually impact your health? Quite an indictment.
5. You might consider Dr. Deborah Bain, MD in Frisco. She understands the body's massive healing capabilities through proper nutrition. www.healthykidspediatrics.com I am not fond of her blood testing method for food intolerances because it tests for IgE or IgG (I can't remember which), and this is an "antihistamine" response. Hidden food intolerances are not "antihistamine" in nature, so her tests may be misleading. Enterolab tests for IgA, which is an underlying antibody response associated with "hidden" food reactions. However she understands that nutrition is important. You can get the Enterolab test results and then take them to her. Tammy Pon MD is a family practice MD in Plano ###-###-#### (she's listed in the Holistic Networker magazine available at Whole Foods) and I am certain that she uses Enterolab. However, she doesn't take insurance. There are others listed in the Holistic Networker. It's pretty hard to unearth these educated people. When you do find someone competent, very often they do not take insurane.
6. Don't let anyone make you feel your son needs to live that way or "settle" for marginal improvement in health. Get on the internet, keep searching and trying alternative specialists and options. Healing is within your reach. Do the research. There is so much available on the information superhighway!
7. Probiotics are the good bacteria in your gut that help fend off disease and promote good digestion of food. A supplement is a great idea for your son's healing, but you also need to eliminate any offending foods or you are throwing good money after bad. Here is an article on it:
http://articles.mercola.com/sites/articles/archive/2003/1...
Sugar is another culprit in assaulting children's guts, since they eat so much of it. The bad bacteria feed off sugar, making them proliferate, causing on overthrow of the good bacteria.
Some probiotics are not very good. Some are inconvenient because they need to be refrugerated. I like Zymogen brand, which I get at Royal Abrams Pharmacy. I used to break open a capsule and put in apple sauce, until my daughter began swallowing it whole.
8. A great website to educate yourself generally, and arm yourself with questions and knowledge when you do speak to conventional physicians, is www.mercola.com.
Good luck!