I developed perioral dermatitis right around the time i started on HRT (Oestrogel and cyclical utrogestan) six weeks ago, and it's getting progressively worse. It could be a coincidence, but it coincided exactly with me starting HRT.
I had perioral dermatitis before in my 20s and ended up having to take pretty hardcore antibiotics to treat it, which had some grim side effects that I'd rather avoid this time. I've tried various topical treatment (fucidin ointment, azelaic acid), as well as cutting out all skin care (just splashing face with cool water) with no luck so far. I need to anyway book in for my 3-month HRT review with the GP, so will ask about it then, but was wondering if anyone else has experienced this as a side-effect of starting HRT and if so, whether you managed to shift it without antiBs?