I have been there with the eczema....it flared a couple years ago on my face really bad. Prior to that it had only been on my hands. Dairy triggers mine and so do acid foods like soda, coffee (had to switch to tea), citrus, tomato sauce.
The seasonal allergies I usually just live with, but for some reason this year I got literally sick from them. Prolly didn't help that I spent three hours in a dusty, mildewy farmhouse attic last Friday helping someone pack....shoulda had a mask on!
I've dealt with the eczema since I was a kid - it used to be behind my knees and the crook of my arms - but over the years it has gradually moved upwards - haven't had it on my legs in more than 35 years.
Stress will also flair it up on me or add to the normal seasonal flair ups - to put it bluntly - I've got it most of thetime and I hate it.