E.,
I've read the responses and do not believe anyone has said this already:
1. Skin problems come from the inside, not the outside. This means creams, baths, applications, topicals, etc. may help your child live with the problem, but will never fix it.
2. Allergies are an immune system problem. To fix them, you have to figure out what in her life is aggravating her immune system so severely.
3. Conventional physicians don't get extra credit (or extra pay) for being detectives. They get paid when they dole out treatments like shots, drugs, etc. Yes, they need to justify the drug prescription with some form of testing, but it doesn't have to be great and certainly doesn't have to fix her health. There is little incentive for the "medical system" to help identify and permanently remove the underlying cause. This would, of course, result in less visits and treatments for your daughter, and less revenue for them, not more. Get the picture?
4. A likely contributing factor is a gut problem. Most of our immune system is in the gut. This means bad food. Bad food = sugar, toxins, pesticides, rotten food, foods that stimulate her immune system, etc. Try to eliminate all of these. http://articles.mercola.com/sites/articles/archive/2003/1...
5. Food intolerances are likely a big piece to the puzzle. The best testing for food intolerances is stool testing (not blood or skin scratch). If you want to know what is aggravating the gut, test in the gut. Go to www.enterolab.com. No doctor referral neeeded (sweet!). Order test kit online, send in specimen, they email the results in 3 weeks. Gluten and dairy are the most likely culprits statistically, but there are others too: soy, eggs, corn, yeast, etc.
6. Once you eliminate the offending foods, healing will begin. To promote healing, give her a high quality probiotic. VERY important. My 5 year old enjoys swallowing hers whole. We use Zymogen brand, but here's another that might be good: http://products.mercola.com/probiotics/?source=nl
7. Supplements are very helpful. Focus on these: vitamin C, omega 3 fish oil, vitamin D, calcium, magnesium. Watch the sugar intake of these and research quality. Lots of stuff out there is junk.
8. Stress can also have a significant negative impact on the immune system. We wonder what on earth could be stressing a five year old, but there are often things that might seem trivial but affect them deeply. Only you can investigate this.
9. For a good doctor to support your path to healing and offer guidance, I second the recommendation of one previous poster for Dr. Deborah Bain. I'm not a fan of her blood testing for food intolerances because it is blood IgE test, rather than stool IgA, and because it may result in a list of 30 foods to eliminate. This is very impractical for most people, and possibly unnecessary. I believe if you start with the main culprits like gluten and dairy, you might see other food sensitivities disappear over time as the immune system calms down. My personal view.
Good luck!