Rash from purging?

Amelia

Hi

So I'm recovering from an eating disorder but I hit a rough patch and have been purging, I'd say sort of consistently for the past few days. I developed a small rash kind of around my mouth on both sides (not sure when exactly) and now it's just gotten bigger. Is this from purging? Have any of you experienced something similar? Do you know how to treat it? I tried lotion but that didn't work.

Here's what it looks like

Not sure what to do☹️