Dogs whose ears are red, swollen, itchy and smelly may be caused by ear mite infection or bacterial disease. Dogs with mites in their ears will become itchy and smelly. The owner needs to use ear cleaning solution to clean the dirt in the dog's ears and use ear mite medicine for treatment. Ear discomfort caused by bacteria should also be treated with medication.

If it is caused by bacterial infection, the owner needs to give the dog anti-inflammatory ointment. If it is serious, it is best to consult a doctor for treatment. In order to prevent dogs from getting otitis, owners should keep their living environment cool and dry during some rainy seasons.