I know how it feels i've suffered from eczema for the last 2 years of my life, though not as severe as what your going through. I don't know what to say to help you out but always remember there will always be someone there with you, someone who loves you and someone who cares for you, Jesus will always be there for you. It's what's got me through these last two years.
Never lose sight of the bigger picture afterall what is our purpose on this world other then to prove we're worthy of the gifts he has install for us. I'll be praying for you.
ps. i know my eczema is caused from a gluten intolerance, and it is the most underdiagnosed kind, perhaps it would be worth investigating.