At a glance
- Shih Tzus are particularly vulnerable to ear infections due to their floppy ears and dense ear hair that traps moisture
- Watch for excessive scratching, head shaking, foul odours, and discharge as early warning signs
- Always seek veterinary diagnosis rather than attempting home treatment, as proper identification of the infection type is crucial
- Prevention through regular ear cleaning with vet-approved products is more effective than treating recurring infections
You might notice your Shih Tzu scratching at their ears more than usual, or perhaps there's an odd smell you can't quite place. Many owners worry when they first encounter these signs, and for good reason. These dogs face unique challenges when it comes to ear health, making them one of the breeds most susceptible to ear infections.
The anatomy that makes Shih Tzus so endearing also creates the perfect environment for ear problems. Their floppy ears trap moisture and create warm conditions where bacteria and yeast thrive. Add their long, dense ear hair to the equation, and you have reduced air circulation and increased wax buildup. Understanding these risk factors helps explain why vigilant ear care becomes so important for this breed.
Recognising the warning signs

When an ear infection develops, your dog will usually show clear signs that something's wrong. The most obvious indicator is excessive scratching or pawing at the ears, often accompanied by persistent head shaking or tilting. You might notice your dog seems uncomfortable when you try to touch their ears, or they may even cry out when the area is handled.
Visual signs become apparent as the infection progresses. Look for redness or swelling around the ear canal, and check for any discharge. The colour can vary significantly, ranging from brown or yellow to black, and sometimes even gray, white, or green depending on the type of infection. In severe cases, you might see crusts, scabs, or even bleeding.
Perhaps the most telling sign is odour. Many owners describe a foul, yeasty smell, sometimes compared to corn chips. This distinctive scent often indicates bacterial or yeast overgrowth and shouldn't be ignored. If your dog displays any combination of these symptoms, prompt veterinary attention becomes crucial to prevent complications like hearing loss or chronic disease.
Understanding the underlying causes
Several factors contribute to ear infections in these dogs, with moisture being the primary culprit. When water gets trapped in those floppy ears after baths or outdoor activities, it creates ideal conditions for bacteria and yeast to multiply. The problem compounds when excessive hair growth inside the ear canal restricts airflow, making it difficult for trapped moisture to evaporate naturally.
Allergies play a significant role in many cases. Both food sensitivities and environmental allergens can increase inflammation in the ear canal, making infections more likely to develop. If you suspect your Shih Tzu has allergies, addressing these underlying sensitivities becomes crucial for preventing recurring ear problems. Poor ear hygiene or infrequent cleaning allows wax and debris to accumulate, further contributing to the problem. While ear mites are less common in adult dogs, they can still occur and require different treatment approaches.
Getting proper veterinary diagnosis
Always consult a veterinarian if you suspect an ear infection. Self-diagnosis and treatment without professional guidance can worsen the condition or mask underlying issues that need addressing. Your vet will examine the ear canal thoroughly, possibly using an otoscope to see deep inside where problems often hide.
Many veterinarians take a swab sample for microscopic analysis, which helps determine whether the infection is bacterial, yeast-related, or caused by mites. This identification proves crucial because different types of infections require different treatment approaches. What works for a bacterial infection might be ineffective against yeast overgrowth, making professional diagnosis essential for successful treatment.
Treatment approaches that work
Veterinary treatment typically begins with thorough ear cleaning using medicated solutions to remove debris and infection-causing organisms. Your vet might prescribe topical medications such as antibiotic, antifungal, or anti-inflammatory ear drops. These often contain steroids to reduce itching and inflammation, providing relief while addressing the underlying infection.
For severe or recurrent infections, oral medications become necessary. These might include systemic antibiotics, antifungals, or anti-inflammatory drugs that work throughout the body. In rare cases where chronic infections don't respond to medication, surgical options like Total Ear Canal Ablation might be considered, though this represents a last resort.
Following your vet's instructions precisely is critical for success. Complete the full course of medication even if symptoms improve early. Stopping treatment prematurely often leads to resistant infections that become much harder to resolve.
Supporting treatment at home
While home remedies cannot substitute for veterinary care, several supportive measures help the healing process. Gentle ear cleaning with vet-approved products like Virbac Epi-Otic, Zymox, or EcoEars can support ongoing treatment. Avoid cotton swabs, which can push debris deeper into the ear canal. Instead, use a soft cloth or gauze to wipe away visible discharge.
Keep your dog's ears thoroughly dry, especially after baths or swimming. Trapped moisture can undo treatment progress and encourage reinfection. Consider using a cone or Elizabethan collar to prevent scratching, which can injure the delicate ear tissue and introduce new bacteria.
Avoid using hydrogen peroxide, apple cider vinegar, or coconut oil without veterinary approval. These substances can irritate inflamed tissues or interfere with prescribed medications, potentially making the infection worse rather than better.
Prevention strategies for long-term ear health

Prevention proves far more effective than treating recurring infections. Establish a routine ear-cleaning schedule, typically weekly or as recommended by your veterinarian. Use only vet-approved ear cleaners rather than over-the-counter products that might not be suitable for dogs.
Regular grooming helps maintain proper airflow by trimming excess hair inside the ear canal. However, never attempt to pluck ear hairs without professional guidance, as this can cause microtrauma that actually increases infection risk. Work with your groomer or vet to determine the best approach for your dog's specific needs.
Monitor for signs of allergies and work with your veterinarian to manage them effectively. Allergic dogs often experience recurring ear problems until the underlying sensitivity is addressed. Regular veterinary check-ups help catch early signs of infection before they become serious problems.
When immediate veterinary care becomes essential
Certain situations require urgent professional attention. If symptoms persist or worsen despite treatment, don't wait to contact your vet. Bloody discharge, severe pain, or signs that your dog is losing balance or showing neurological symptoms could indicate the infection has spread to the inner ear.
Head tilting combined with loss of coordination suggests possible inner ear involvement, which can become serious quickly. Similarly, if you see no improvement after several days of prescribed treatment, the infection might be resistant to the current medication or caused by something other than initially diagnosed.
Research consistently shows that early detection, proper diagnosis, and adherence to treatment protocols are critical for managing ear infections successfully. Preventive care through regular cleaning and grooming proves highly effective in reducing both frequency and severity of infections. The key lies in understanding your dog's unique risks and implementing consistent, evidence-based care strategies that address both immediate problems and long-term ear health.