Most allergy tests look for the "usual" suspects: ragweed, mold, animal dander, mites, tree pollen, etc. I had a skin test at 11 years old against 35 common allergens and reacted to none of them. So I was told I have no allergies and therefore non-allergenic rhinitis. However, I'm very allergic to fragrance and lavender and have been since I was a baby. I've also since become allergic to jasmine, lilies, lilacs, juniper bushes, ceder, cats, dust, mold, hay, and fresh grass. Only a handful of those allergies are on the usual allergy tests. I actually discovered the causes through trial and error instead of an allergist. (Doesn't take a genius to figure out what a migraine, sneezing attack, hives, eczema, and asthma attack whenever I'm around lavender or lavender products means.)
Anyway if you're allergic reactions are severe (headaches/migraines, nausea, skin rashes) I suggest asking for a more extensive allergy test. There are some strange allergies out there that aren't on any normal test- I have a friend who is allergic to alcohol, if he gets it on his skin he gets blisters; if he smells it he gets dizzy and can pass out. So it's possible you still have an allergy to something even if you had a negative reaction during the test.
Additionally abnormalities in the nasal tissues can cause problems. While I've never heard of anything causing sneezing, it could be something to rule out and you may want to ask your doctor about it.
You may want to consider going to a Holistic Allergy practitioner or Dr. trained in "Allergy Antidotes"or NAET. 1000s of practitioners around the world in these.
There are 5 different categories of allergies and sensitivities and they deal with all them including "undetectable" ones, using Energy Medicine protocols. Non-invasive and no meds.
Most efficient and result oriented method for allergy elimination.
Just do a search for your area.
My advice does not constitute professional consultation.
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