My 8 yr old male cat is an indoor only cat. He has never had ear mites. He is HIV+ since birth, although he was never tested for it (he appeared on my doorstep during a blizzard, still nursing from his mother who is HIV+). A week ago, I noticed the inside of his ear a light swelling. Now it is quite noticable. I believe it to be an aural hematoma. Would it be safe to drain it by puncturing it with the one of the injection needles I use to test my blood sugar? I really can’t afford spending a thousand dollars for the vet.