Just a suggestion. When I went through those kinda problems I found out that intolerance to some foods I was ingesting were weakening my immune system that making me more suspect to allergens coming from outside of my body....if that makes any sense to you. I had a blood test done through ThinkRite systems and it was helpful enough to cause me to no longer have to deal with my allergies. My doctor and a couple of naturopaths ran several allergen tests on me that just cost me a lot of money and didn't help me in the least. Might want to look into this test....I'm free of allergies now cause of it and feel fine now.