My cat has this one little spot on her chin that looks like a scab trying to heal because she rubs up against things. Which I thought was pretty normal for a cat. On her most recent follow up vet visit the diagnosis was, "your cat has feline acne". Someone tell me that's not a load of bullshit, if you ever heard one. But at least the money wasted on the visit and the two different types of medication gives me something to laugh about.