Dog Scratching Ears Constantly: Causes, Treatment, and When to Act
General guidance — not a diagnosis. When in doubt, call your vet.
If your dog won't stop scratching their ears, shaking their head, or rubbing the side of their face on the floor, there's almost certainly something bothering their ears. Ear problems are one of the most common reasons dogs visit the vet, and they're rarely something that resolves on its own without treatment.
Why Is My Dog Scratching Their Ears?
Ear Infection (Otitis Externa)
Bacterial or yeast ear infections are the leading cause of ear scratching in dogs. Yeast infections produce a dark brown, waxy discharge and a distinctive musty odor. Bacterial infections cause redness, swelling, yellow or green discharge, and significant pain. Dogs with long, floppy ears (Cocker Spaniels, Basset Hounds) and dogs that swim frequently are especially prone to ear infections.
Ear Mites
Ear mites are tiny parasites that cause intense itching, dark coffee-ground-like debris in the ear canal, and vigorous head-shaking. They're most common in puppies, cats, and dogs that spend time outdoors. Ear mites are contagious between pets.
Allergies
Food allergies and environmental allergies (atopy) frequently manifest as ear itching in dogs. An allergic dog may have recurrent ear infections in both ears, along with itchy skin, paw licking, and facial rubbing. Managing the underlying allergy is key to preventing recurring ear problems.
Foreign Bodies
Grass seeds, foxtails, or other debris can become lodged in the ear canal and cause sudden intense scratching. This is more common in outdoor dogs and dogs that walk through tall grass.
Polyps or Ear Canal Masses
Less commonly, growths inside the ear canal can cause irritation and scratching. These require veterinary evaluation and may need surgical removal.
When to Worry: Signs That Need Prompt Vet Care
Don't delay if your dog:
- Has a strong odor or colored discharge from the ear
- Holds their head tilted to one side (sign of inner ear involvement)
- Cries or pulls away when you touch the ear
- Has scratched the skin raw or caused bleeding around the ear
- Seems dizzy, uncoordinated, or nauseous (signs of vestibular disease)
- Has been scratching for more than 48 hours without improvement
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What to Do at Home
- Look, don't dig: Gently lift the ear flap and look at the visible part of the ear canal. Redness, dark discharge, or odor are signs of infection.
- Never insert cotton swabs into a dog's ear canal — this pushes debris deeper and can rupture the eardrum.
- Clean gently if indicated: If your vet has previously recommended a specific ear cleaner for your dog, you can use it as directed. Otherwise, do not put anything in the ear without guidance.
- Prevent moisture: After baths or swimming, dry ears thoroughly.
- Avoid home remedies like hydrogen peroxide or vinegar — these can further irritate an already inflamed ear canal.
Ear infections almost always require prescription medication (ear drops or oral antibiotics/antifungals) to resolve. Delaying treatment often leads to more severe infection and greater discomfort (AAHA Canine Life Stage Guidelines, 2019).
Frequently Asked Questions
Why does my dog keep scratching their ears? Persistent ear scratching, head shaking, or face rubbing almost always means something is bothering the ears. The leading cause is an ear infection (yeast — dark, waxy, musty discharge; or bacterial — redness, swelling, yellow/green discharge and pain). Other causes include ear mites, food and environmental allergies, foreign bodies like grass seeds, and, less often, polyps or ear-canal masses.
When should I take my dog to the vet for ear scratching? Don't delay if your dog has a strong odor or colored discharge, holds the head tilted to one side (possible inner-ear involvement), cries or pulls away when you touch the ear, has scratched the skin raw or bloody, seems dizzy, uncoordinated, or nauseous (signs of vestibular disease), or has been scratching more than 48 hours without improvement.
Can I treat my dog's itchy ears at home? Only cautiously. Look (don't dig) — gently lift the ear flap and check for redness, dark discharge, or odor. Never insert cotton swabs into the ear canal (it pushes debris deeper and can rupture the eardrum), only use an ear cleaner your vet has previously recommended, dry the ears after baths or swimming, and avoid home remedies like hydrogen peroxide or vinegar. Ear infections almost always need prescription medication.
Why does my dog get recurrent ear infections? Recurrent infections in both ears — often with itchy skin, paw licking, and facial rubbing — usually point to an underlying food or environmental allergy, so managing the allergy is key to prevention. Dogs with long floppy ears (Cocker Spaniels, Basset Hounds) and frequent swimmers are also more prone to ear infections.
Are dog ear mites contagious? Yes. Ear mites are tiny parasites that cause intense itching, dark coffee-ground-like debris, and vigorous head-shaking, and they're contagious between pets. They're most common in puppies, cats, and outdoor dogs, so other household animals may need treatment too.
Still Not Sure if Your Dog Needs a Vet?
When you're not sure if this is wait-and-see or call-tonight, Voyage AI Vet triages in under 2 minutes. Describe what you're seeing in chat, share photos of your dog's affected skin, any redness or oozing, and the surrounding fur, or hop on a live video call if you want a second pair of eyes. Every answer comes with citations to the actual veterinary literature it's pulling from — so you see exactly where the guidance comes from, not just a chatbot's word.