I keep seeing this acne face mapping myth going around online. where can i find information to debunk it?

Don't bother: Our world is full of disinformation. Don't argue with people who are dumb enough to believe it, unless it's an actual threat to someone's health, finances, the peace of your community, or the integrity of your local schools. The absence of any controlled studies on this "traditional chinese medicine" spinoff is sufficient to let you know that it's just made up. Manage acne medically.

Just ignore it: There's no need to spend time and energy looking for information to debunk a myth. It's up to the myth propagators to prove their beliefs, not up to the rest of the world to disprove them. Only if a myth starts to affect the rest of us, would we have to disprove it. Certain types and locations of acne may reflect certain causes, but there's no need for elaborate acne-mapping to figure that out.