I know alot of ppl that have used Moogoo msm cream with great success on dermatitus ,excema etc.Maybe u can give that a go as a more natural alternative.They r Australian owned & based in QLD ,the owner ,Craig ,is always very helpful & they also have alot of info about their products on the site as well as info on different skin conditions.
I have dermatitus myself & currently have it on my nipples which is really awful & i'm just waiting on some Moogoo atm.It's really good on babies & children too