In my experience, yes, 100% inflammation. It doesn't always have to be from the same source. Could be omega 6, massive insulin spike/glycation, auto-immunity, something poisonous (hippie juju magic detoxes, blarg). Since eating like I do now I'm completely clear.
Zinc is important for skin healing and various nutrient shortages will exacerbate inflammation and impede the immune system and general healing so that's my suspicion about people with tons of acne taking zinc and getting a bit better. If anyone isn't getting all of their nutrients as best they can they should definitely tackle that first.
Stabbing conventional wisdom in its face.
Anyone who wants to talk nutrition should PM me!