Why Is Your Dog Scratching Their Ear and Shaking Their Head?

If you’ve noticed your dog repeatedly scratching at their ear or shaking their head, you’re right to pay attention. While an occasional shake or scratch is perfectly normal, persistent behavior like this is often your dog’s way of telling you something isn’t quite right. Understanding the most common causes can help you take the right steps quickly and keep your pup comfortable.

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Common Causes

Head shaking and ear scratching are classic signs that something is irritating or bothering your dog’s ear canal. The causes range from minor and easily treated to more serious conditions that require prompt veterinary attention. Here are the most common culprits:

• Ear infections (otitis externa): Bacterial and yeast infections are among the leading causes of ear discomfort in dogs. They thrive in warm, moist environments, making the ear canal an ideal breeding ground — especially in dogs who swim frequently or have floppy ears that restrict airflow.
• Ear mites: These tiny parasites are highly contagious and intensely irritating. They’re more common in puppies and dogs who spend time around other animals, and they often produce a dark, coffee-ground-like discharge inside the ear.
• Allergies: Food allergies and environmental allergies — such as reactions to pollen, dust mites, or mold — frequently manifest as ear inflammation in dogs. If your dog’s ear issues seem seasonal or recurring, allergies may be the underlying trigger.
• Foreign objects or debris: Grass seeds, foxtails, dirt, and other debris can work their way into the ear canal during outdoor adventures, causing immediate and intense irritation.
• Excess moisture or wax buildup: Too much moisture trapped in the ear after bathing or swimming can create the perfect environment for infection. Similarly, an overproduction of earwax can cause discomfort and reduced hearing.

Each of these causes requires a slightly different approach, which is why identifying the root issue is so important before jumping to treatment.

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Symptoms to Watch For

Your dog can’t tell you their ear hurts, so it’s up to you to recognize the signs. Catching symptoms early can prevent a minor irritation from developing into a painful, deeply rooted infection. Keep an eye out for the following:

• Persistent scratching at one or both ears
• Frequent or vigorous head shaking
• Redness, swelling, or warmth inside the ear flap
• A strong, unpleasant odor coming from the ear
• Dark brown, yellow, or bloody discharge
• Tilting the head to one side
• Whimpering or pulling away when their ear is touched
• Loss of balance or disorientation (a sign of inner ear involvement)
• Hair loss around the ear from excessive scratching

It’s worth noting that some of these symptoms, particularly loss of balance or a persistent head tilt, can indicate a more serious inner or middle ear problem. These signs should never be ignored or left to resolve on their own.

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What You Can Do at Home

Before reaching for any over-the-counter products, take a calm, careful look at your dog’s ear. Gently lift the ear flap and use good lighting to check for obvious signs of redness, discharge, or visible debris. If you notice a foreign object like a grass seed lodged in the canal, do not attempt to remove it yourself, as this can push it deeper or cause injury. That’s a job for your veterinarian.

For mild cases with no visible discharge or signs of infection, a gentle cleaning with a veterinarian-approved ear cleaning solution can help. Squeeze a small amount into the ear canal, massage the base of the ear for about 30 seconds, then allow your dog to shake their head before wiping away any loosened debris with a soft cotton ball. Never use cotton swabs inside the ear canal, as they can compact debris and damage delicate tissue.

If your dog is prone to ear issues, keeping their ears dry is one of the best preventive steps you can take. Place a cotton ball at the entrance of each ear before baths, and gently dry the outer ear after swimming. Regular, routine ear checks — once a week is ideal — allow you to catch problems early before they escalate.

It’s important to resist the urge to use home remedies like hydrogen peroxide, apple cider vinegar, or rubbing alcohol inside your dog’s ears. These substances can irritate the sensitive skin of the ear canal and, in some cases, cause more harm than good, particularly if the eardrum is already compromised.

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When to See a Vet

Some ear issues genuinely do resolve with gentle home cleaning, but many require professional diagnosis and treatment. You should schedule a veterinary appointment if:

• Symptoms have persisted for more than a day or two despite gentle cleaning
• There is significant redness, swelling, or a foul odor
• You notice any discharge that is yellow, brown, or bloody
• Your dog is in visible pain or reacts strongly when their ear is touched
• Your dog is experiencing a head tilt, loss of balance, or seems disoriented
• Symptoms keep coming back repeatedly over weeks or months

A veterinarian will examine the ear canal with an otoscope, and in many cases will take a swab to identify whether the issue is bacterial, fungal, or parasitic. This matters enormously, because using the wrong treatment — such as an antifungal medication on a bacterial infection — won’t clear the problem and may delay proper care. Prescription ear drops, oral antibiotics, antifungal treatments, or parasite medications may all be appropriate depending on the diagnosis.

Recurring ear infections, in particular, warrant a deeper conversation with your vet about underlying allergies or anatomical factors that might be making your dog more susceptible.

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How Pet Insurance Can Help

Ear infections and related conditions can require multiple vet visits, diagnostic testing, and prescription medications, and costs can add up faster than most pet owners expect. Having a pet insurance policy in place means you can focus on getting your dog the care they need rather than worrying about the bill. Many plans cover diagnostics, medications, and follow-up appointments, making them well worth considering before an issue arises.

Protective Care: Get a free pet insurance quote and protect your dog today

For times when you need immediate guidance from a licensed veterinarian without leaving home, telehealth services can be a lifesaver.

For more clinical details on canine health, you can refer to the professional guidelines from the Merck Veterinary Manual.

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Your dog depends on you to notice when something is off, and the fact that you’re already paying attention says a lot about the care you provide. Whether the cause turns out to be something simple or something that needs professional treatment, acting promptly is always the right move. With a little knowledge and the right support, most ear issues in dogs can be resolved quickly, leaving your pup comfortable, happy, and back to their usual self in no time.