My 11 month old cat has been suffering most of her life so far with chin acne or an allergy of some kind. Symptoms: Scratching, scabbing, bleeding, and pus on chin, cheeks, corners of the mouth, eyes, patch of skin between eyes and ears, and behind ears. At one vet appointment she was treated for mites, she got a little better for awhile and the symptoms were mainly just limited to the chin. Within a few months after that she got much worse and ended up with bleeding weeping sores with pus and scabbing. The irritation had spread from the chin to the corners of the month and upper lip, it was most severe around the mouth and chin with scratching all around ears and eyes too. At another vet visit a week ago they said it was just an allergy with a secondary infection. She was given a steroid shot and some oral antibiotics. She stopped itching pretty much immediately and with in a couple days all the pus dried up and all the scabs flaked off. She's doing great! Now a week later I'm noticing her starting to scratch her face again. I don't want the skin infection to come back. Aside from changing her food, I'm not really sure what the best steps to take are at this point. Any good advice or resources for figuring out what she's allergic to or steps to take to prevent the sores on her face from coming back? Thank you so much in advance!!