Ok so I've had a serious outbreak of perioral dermatitis which has been miserable.
I had some fab advice here which I followed but in my research I came across "traditional west African black soap" looks like cake and is very cheap and has really helped to clear up my skin.
I have also noticed my 46 yr old skin is soft and dewy and improving every day. It's so smooth as well and I hardly need moisturiser although I do still use a light one.
It's supposed to be good for many things so I just thought I'd share.