I've always suffered from horrible seasonal allergies April - October. Nothing would work to help aid them until I started following a certain diet I found in a homeopathic magazine. Avoid bread, pasta and rice. I know this sounds hard but it helps to stop my allergies completely.
I dont need any medication and I go back to eating them in October when my seasonal allergies are better. If you can't avoid them completely, white bread/buns and regular pasta Ive found are the absolute worst for me, try to avoid them at least.