I got hives in mid July and the rash was pretty well over most of my body except my back. Went to the doctor and he prescribed me Prednisone which I wouldn't advise anyone taking. The rash did go away at least. But everytime I am working with tomatoes in my garden I get a itchy little blisters on my hands and sometimes arms even if I have gloves on. Calamine Lotion is a big help for the itching. I was never allergic to tomatoes before, but this year I planted yellow tomatoes and I have never raised them before. So I assume they are my problem. I would say you are probably are allergic to them especially if you noticed the rash after you put them on your deck. My rash always starts a few hours after I handle tomatoes.