Otoplasty 9 years ago- oozing yellow stuff now. No pain. I've been letting it crust over but should I clean it? (photos)

I had otoplasty 9 years ago. A few years later I had pain and oozing behind my left ear. My surgeon removed a suture then. Now it's been 6 years since &I'm having yellow oozing & redness (no pain) behind that ear. My husband said it almost looks like poison ivy because it's spreading away from my ear. My questions are how do I care for it (hydrogen peroxide,etc) until I can go see my surgeon (I moved) & does this look like an infection? What's the worst case scenario if it's infected? Thank you!