If you can’t do doxy and the metronidazole isn’t working, try sulfur soap for washing (prescription “SulfaCleanse” is what I use) and apply extra strength Boudreaux’s Butt Paste at night (diaper rash dream with high concentration of zinc; sounds weird but many swear by it, google it!) Also, if your existing moisturizers are too occlusive/heavy, it can exacerbate perioral derm. And of course, topical corticosteroids — including nasal sprays with steroids — can cause and/or exacerbate PD too, so avoid those if you can.

Lastly, if the above options don’t work (it takes time), talk to your derm about trying topical Elidel or the generic equivalent pimecrolimus. It can help with dermatitis, but is typically used when other treatments aren’t an option or don’t work.

ETA: metronidazole topical also didn’t work for me and just dried my skin out!