Didn't you just move to a different area/climate? A change in humidity, mold, spores, dust, and pollen may be a contributing factor (most of which you can't do much about). Skin and the natural bacteria that lives on/in it, can react in weird ways. ...maybe the solution is to move to the tropics.
Yeah, I moved two kilometres and pollution in Finland is really not a thing. No mould in either of these apartments. Sun helps my skin a little but didn't heal it what so ever, I was in Thailand in the spring, and the summer in Finland was really awesome too, neither of which made much difference.