At some point in your practice, you have looked at a client's skin and thought: I cannot explain this. She had clear, calm skin last month. Nothing in her routine has changed. She's using the same products. The same treatments. And her skin is suddenly — inexplicably — inflamed, congested, and reactive in a way that no topical solution seems to touch.

Except it's not inexplicable. It just requires a framework that conventional esthetic education doesn't provide.