Have you been an allergist? Research the 5 Day Extended Patch Test on the internet. This test saved me. Your entire upper back will be covered with patches testing for various natural and chemical elements for 5 full days which if allergic will react. Not all dermatologists or allergists are licensed for this test. Thus I suffered many years because my dermatologists never told me about this test. I was told it was everything from heat rash, yeast issues, fungus, one told me it was eczema and to stop washing with soap. The derm that told me it was eczema didn't even tell me there were types of eczema with different causes and different ways to treat. Never told me how to learn via a test what to avoid. All my derms offered were topical steroids; steroids are not a cure, they don't stop the cause, they are only a treatment that come with negative side effects over time.
I didn't develop this problem until middle age 50, which is common for the forms of eczema I have. Our bodies can tolerate certain elements and chemicals, both natural and artificial, for decades but finally the body says enough is enough. Reaction time lessons and symptoms become more severe. There is no cure only avoidance. I am free of my Allergic Contact Dermatitis, ACD, symptoms today, free of all 3 types of eczema symptoms today because of blogging sites like the Mayo and Inspire, and Earthclinic where I educated myself, plus of course working with doctors and telling them what I learned I needed done. I've read that Facebook has good sites for skin issues also. Mind you I had excellent medical in a major city full of specialists. Still don't assume they all have the answers. Dermatologists treat hundreds of skin diseases, you must do your own research based on your symptoms. New Zealand has a very good skin site which has thousands of photos which helped me diagnosis one of my less common types of eczema, Perioral. Mayo led me to a home treatment that works for about 40% of us, so simple, for my Grover's Disease, GD, a form of eczema. GD is a truly debilitating form without any proven prescriptive medical treatment and I have been free of it for 4 years now because of the Mayo site and my angel, a contributor who shared. My 4th dermatologists is where I learned about the 5 Day Patch Test. Keep searching and best of luck, fill us in on what you learn. All can learn from you.