A common misconception is that dark debris automatically means mites, so any “cat ear mites treatment” is harmless to try. In reality, the wrong drops can sting inflamed tissue, and delaying the right diagnosis can let infection deepen. Ear mites can also trigger scratching that breaks the skin, which changes the ear environment and makes yeast or bacteria more likely. That is why veterinarians treat the ear as a system: parasite, skin inflammation, and secondary infection can stack together.
What not to do: avoid putting hydrogen peroxide, vinegar mixes, essential oils, or alcohol-based cleaners into a sore ear. Avoid cotton swabs down the canal, which can pack debris deeper and increase pain. Avoid using leftover dog ear medication; cats are not small dogs, and dosing and safety differ. If the cat tilts the head, loses balance, or seems nauseated, the ear may be more than a surface problem and needs prompt veterinary help.