Dog ear problems often begin with small changes: a few extra head shakes, an ear rubbed against the couch, or a smell that was not there last week. Recognizing those changes can help you arrange care before inflammation becomes more painful.
Common early clues
Watch for repeated head shaking, scratching, sensitivity when the ear is touched, redness at the opening, and new odor or discharge. Some dogs hold one ear differently or become reluctant to have their head petted. Ear discomfort can affect sleep and mood. These signs are not specific to one type of infection.
What different symptoms do—and do not—tell you
Brown discharge is not proof of yeast. A strong smell does not identify a particular bacterium. Head shaking does not distinguish a foreign object from inflammation. Ear mites, allergies, yeast, bacteria, and foreign material can produce overlapping signs. A dog with one suddenly painful ear after a walk through tall grass may need a check for a lodged seed or other object.
Why the eardrum matters
A veterinarian can use an otoscope to examine the canal and, when possible, the eardrum. A sample of discharge viewed under a microscope can help guide treatment. Some ear medications can be unsafe when the eardrum is damaged, so do not start leftover drops based on a visual guess.
How soon should the dog be seen?
Book a prompt appointment for persistent shaking, scratching, redness, discharge, or odor. Seek urgent care for sudden balance problems, a pronounced head tilt, facial weakness, severe pain, or a swollen ear flap. These signs may indicate deeper disease or complications.
What you can do before the visit
- Record when symptoms started and whether one or both ears are affected.
- Keep the ears dry and avoid swimming.
- Do not use peroxide, vinegar, oils, or deep cotton swabs.
- Note any other skin itching, licking of paws, or past ear infections.
- Ask your clinic whether you should leave the ear uncleaned for cytology.
Preventing repeated ear trouble
Some dogs develop recurrent inflammation because of allergies or other underlying conditions. A veterinarian may recommend a tailored ear-care routine and investigation of skin disease. More cleaning is not always better: unnecessary products can irritate healthy canals.
What to ask the vet
Ask what the exam and cytology showed, whether the eardrum was visible, what treatment is appropriate, how to administer it, and when to recheck. For a detailed decision guide, see when a dog with ear symptoms should see a vet and questions to ask about ear infections.
References
MSD Veterinary Manual: Ear Infections in Dogs; VCA: Otitis Externa. General information, not a substitute for examination or a claim of named veterinary review.
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.