Ear mites are generally moist black massive secretions, and there is no oil in the auricle. With a microscope, you can see that insects are crawling; The secretion formed after bacterial infection is relatively dry, and the auricle is oily compared with ear mites. But all the above are subjective comparison methods. Many people treat fungi with drugs for ear mites for a period of time, and they are dirty every day, so the possibility of fungi should be considered.
For the sake of cats, it is best to go to the pet hospital for biopsy and microscopic examination to determine what kind or mixture it is, and then prescribe the right medicine. Ear mites and fungal infections are a long-term struggle process, which may be repeated. Pay special attention to keep the home environment clean, don't take the cat out, and usually strengthen nutrition.