You might want to look into NAET treatment for allergies. I have a friend whose DD had some food allergies (totally BFed, homebirth, etc...) and saw a practioner and now the allergies are gone. Her dd was treated via her mom. My friend swears by it and she is going to become a practioner. Read the site for more info, noninvasive... doesn't hurt to try.
My DH has severe chemical allergies (fragrance smells are like kryptonite to him) and he is currently sick for a week b/c I made the mistake of using scented soap a week ago. I'm going to have him see a NAET practioner (the one my friend did).
To answer your question, yes I totally think moving can help.
I have dust allergies (dust mites). When I moved from NYC to Southern California... they pretty much stopped. My DH noticed it. We're 20 minutes from the ocean, maybe that helps.
Ocean air is ionized, no? Really fresh and clean. Not surprising.Ionized air and it's role in health
|Air ions are important, as a high proportion of negative ions will leave you feeling lively, uplifted, and enthusiastic. Too many positive ions tends to leave you feeling depressed, lethargic and full of aches and pains. In general, exposure to negatively ionized air has been shown to increase oxygenation of the lungs, vital capacity, and ciliary activity. All types of beneficial responses take place as a result of these friendly ions.
When I lived in NYC, DH's apartment was soooo dusty and unbearable. We bought an expensive ($500, Friedrich) big, bulky air cleaner. It produces negative ions and sucks the dust from the air through a filter. It helped me feel soooo much better. So that's another thing you can consider.
For a person with Dust Mite allergies, wall-to-wall carpeting is a no-no, but that's what I have in my house... and since I've been here (4 years) I have not needed to use my air cleaner at all.
Here is a website that sells air cleaners and explains indoor air pollution.
I'm not endorsing it or anything... I just found it on a search.
I did used to buy products from Allergy Control Products
(mattress covers, pillow covers, etc...) Get their catalog... it's very informative, whether or not you order from them.