Hi, I used to get it on my back and sometimes my chest, stress seemed to trigger it off. Though sugar has an effect too. I had a really bad flare up last year and tried out umpteen different creams with no success.
Then I noticed a big difference when I began putting tea tree oil and lavender in my bath...I now add a few drops of each all the while. I think it could be the healing qualities of these oils that do the trick.
I also use lavender on my temples when I have a headache, it's really soothing.
Good luck !!