How to determine if a client's skin barrier is unstable before performing a skin resurfacing treatment?

I was recently reviewing a case from my skincare studio where I was preparing to perform a mild chemical peel on a client. The core issue was that the client wanted quick brightening, but their face was already experiencing stinging and redness; proceeding with an acid-based treatment would easily lead to a complaint. The tricky part about this situation isn't any single action, but rather that…