What can this be? (ear/eye eczema )

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I have had for several years some kind of sore behind my right ear. Normally it would come, I tok som cortison on and it went away, returned 1 month later ++ It has been like that for 2-3 years.. But the last year it has been more aggresive with a "flare" 1-4 times each month. Suddenly I also started to get something similar inside the top of the ear. Its a very bad picture but its not aggressive now (I justed tok cortison on..). And the last 1/2 year I have also had similar on the top of my eye. The last 4 months it has been there always. It doesn't go away but the pain is less and it doesn't burn so much. Its has a clear fluid and its itching and burning.. Here is a picture:http://tinyurl.com/673nuxsI have been told it can be a food reaction to tomatoes, but I had this even before I ate tomatoes... I'm on SCD/ low oxalate diet.KarianneASD