Why is there brown discharge in my dog’s ear? | arlo.® Atlas
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Overview
Brown discharge in your dog’s ear is often caused by wax build-up, trapped dirt, irritation or an ear infection. It doesn’t always mean something serious, but it is a sign that the ear needs a closer look.
If the discharge is new, smelly, itchy or your dog seems uncomfortable, there may be an underlying problem that needs attention.
Things To Check
1. Check whether the discharge is in one ear or both, and whether it’s the same each time you notice it.
2. Look closely for redness, swelling, heat, scabs or broken skin around the ear opening.
3. Notice whether your dog is scratching, shaking their head, tilting it or reacting when the ear is touched.
4. Smell the ear if you can do so gently, as a strong or yeasty odour can be a useful clue.
5. Check whether the discharge looks like soft brown wax, dry flakes, sticky debris or dark crumbly material.
6. Think about recent triggers such as swimming, bathing, muddy walks or grooming that may have introduced moisture or dirt.
7. Make a note of any changes in your dog’s behaviour, such as irritability, rubbing their face or avoiding touch.
Common Causes
The most common cause is simple wax build-up, especially in dogs with hairy, narrow or floppy ears. This can make the ear look brown without there being an infection.
Ear infections are also common. These may happen when moisture, wax, bacteria or yeast build up inside the ear and irritate the skin.
Allergies, skin sensitivity or ongoing irritation can also lead to brown discharge because the ear keeps producing extra wax or debris.
Less commonly, a foreign body, ear mites or another ear problem could be behind the discharge, especially if your dog is very itchy or the issue keeps coming back.
What To Do
Start by keeping an eye on the ear for a day or two if your dog seems otherwise well and the discharge is mild. Take note of any smell, discomfort or head shaking.
Keep the ear dry after bathing, swimming or muddy walks, and avoid poking inside the ear with cotton buds or anything sharp.
If your dog tolerates it, you can gently wipe away visible discharge from the outer part of the ear with a clean, soft pad. Don’t try to clean deep inside the ear canal.
If the discharge returns, worsens or your dog seems sore, book a vet check so the cause can be identified properly.
Products That May Help
If your dog is prone to dirty ears, regular grooming or gentle ear-cleaning routines can be part of good at-home maintenance. The arlo.® Pet Care collection may help support that routine.
Related Questions
Should I clean brown discharge out of my dog’s ear?
How can I tell if my dog has an ear infection?
Why does my dog keep getting dirty ears?
Atlas is here to support owners with practical, easy-to-understand guidance. It is not a substitute for professional veterinary advice. If you're concerned about your animal's health, symptoms worsen, or something doesn't feel right, contact your vet.