Yeast Infection By Waxing What Can I Do About A Yeast Infection?

What can i do about a yeast infection? - yeast infection by waxing

My dog has an ear infection, is very red, and the wax has a bad smell. I'm pretty sure it's a yeast infection. I have an appointment with your veterinarian as soon as I could get it Thursday. Is delayed by at least I can buy or what I can do for them until then?