Intriguing anecdote: my sister had a similar square off with acne for many years. She thought it would be life long (roccutane did nothing for her). Then recently, she did a barrage of allergy testing. It turns out she was highly allergic to pretty much everything she ate (onions, lettuce, other shocking things like this). She’s removed the culprits and seen an incredible transformation — still scarred a bit, but so much more confident.
I hope this helps someone else.