Shih Tzu Ear Infections: Hairy Canals and Chronic Issues

By Emiel Maddens  ·  Reviewed in consultation with licensed veterinary professionals  ·  Updated June 2026  ·  15 min read

Shih Tzu owners quickly learn that this breed's beautiful, flowing coat extends into places that cause real health problems. Dense hair grows prolifically inside the Shih Tzu's ear canals, and when combined with their floppy, heavily furred ear flaps and brachycephalic skull structure, the result is one of the most infection-prone ear environments in the canine world. Ear infections are among the most common veterinary complaints in Shih Tzus, and for many dogs, the issue is not a single episode but a chronic, recurring pattern that requires lifelong management.

This guide explains the specific combination of factors that makes Shih Tzus so susceptible to ear infections and provides a comprehensive prevention and treatment protocol tailored to the breed's unique challenges. Understanding why your Shih Tzu's ears are vulnerable is the foundation for keeping them healthy.

Why Shih Tzus Are Highly Prone to Ear Infections

1. Dense hair growth inside the ear canal

The Shih Tzu's most significant ear infection risk factor is the profuse hair growth inside the ear canal itself. This is not just a few stray hairs around the ear opening. Shih Tzus grow thick tufts of hair deep within the vertical and horizontal ear canals, essentially creating a densely packed plug of hair that traps every bit of moisture, wax, and debris that enters the ear. This hair acts as a wick that absorbs and holds moisture against the canal walls, creating persistently humid conditions even when the external environment is dry.

The hair also physically obstructs the natural migration of cerumen (ear wax) out of the canal. In a healthy ear, wax moves slowly outward, carrying dead skin cells, debris, and microorganisms with it. When dense hair blocks this migration, wax accumulates, creating a nutrient-rich environment for yeast and bacteria to thrive. The combination of trapped moisture and trapped wax in a warm, dark canal is essentially a perfect culture medium for Malassezia yeast and opportunistic bacteria.

2. Brachycephalic anatomy and ear canal structure

Shih Tzus are a brachycephalic breed, meaning they have a shortened skull and compressed facial structure. This skull conformation affects more than just the airways. The altered skull shape impacts the ear canal anatomy, often resulting in narrower canals with more acute angles between the vertical and horizontal canal segments. These structural differences reduce the ear's ability to self-ventilate and self-drain, making the canals more prone to retaining moisture and debris. Similar anatomical challenges affect French Bulldogs, another brachycephalic breed with high ear infection rates.

3. Heavy, floppy, coated ears

The Shih Tzu's ear flaps are covered in long, dense fur and hang against the sides of the head, completely covering the ear canal opening. This external coverage adds another layer of airflow restriction on top of the internal hair obstruction. The combination means that air cannot reach the ear canal from outside (because of the floppy, furred ear flap) and cannot circulate within the canal (because of the dense internal hair). To understand how ear shape impacts infection risk across breeds, see our guide on floppy ears vs. erect ears.

4. Allergic dermatitis

Shih Tzus have elevated rates of both environmental allergies (atopic dermatitis) and food allergies. Allergic inflammation affects the skin lining the ear canal just as it affects skin elsewhere on the body, increasing cerumen production, altering the ear canal pH, and disrupting local immune defenses. For Shih Tzus with underlying allergies, ear infections become a manifestation of their systemic allergic disease, and the infections will continue to recur until the allergies are addressed. If your Shih Tzu is chronically itchy in addition to having ear problems, allergies are very likely the underlying driver.

5. Seborrhea and excessive oil production

Some Shih Tzus are predisposed to seborrhea, a condition involving abnormal skin cell turnover and excessive sebum (oil) production. Within the ear canal, seborrhea increases the amount of lipid-rich material available for Malassezia yeast to feed on. Since Malassezia is a lipophilic organism that thrives on oils and fats, the combination of seborrheic excess and the trapped, warm canal environment created by hair and floppy ears creates ideal growth conditions. This is why Shih Tzu ear infections so frequently involve yeast as the primary or co-pathogen.

The Ear Hair Debate: To Pluck or Not to Pluck

One of the most commonly debated topics in Shih Tzu ear care is whether to pluck the hair from inside the ear canals. This debate exists because both sides have valid points, and the answer depends on the individual dog.

The case for plucking

Removing hair from the ear canal dramatically improves airflow and ventilation, allows ear cleaning solutions and medications to reach the canal walls effectively, reduces moisture and wax trapping, and enables better visual inspection of the canal. For Shih Tzus with chronic ear infections where hair obstruction is clearly contributing to the problem, ear hair removal can significantly reduce infection frequency.

The case against plucking

Plucking hair from inside the ear canal causes micro-trauma and inflammation at each hair follicle. This inflammation can itself trigger an ear infection, which is counterproductive. Aggressive or improper plucking can damage the delicate canal epithelium, and the procedure can be painful, especially if large amounts of hair are removed at once.

The balanced approach

Most veterinary dermatologists recommend a middle-ground approach for Shih Tzus. If the ears are currently healthy and not experiencing frequent infections, gentle trimming of visible hair at the canal opening may be sufficient. If the dog has recurrent infections and the hair is clearly contributing to the problem, careful, gradual plucking by a professional groomer or veterinarian, followed immediately by ear cleaning with a medicated solution, can reduce infection risk. The key is to pluck small amounts at a time, use ear powder to grip the hair, and clean immediately afterward to prevent inflammation-triggered infection. Never pluck aggressively or attempt to remove all internal hair at once.

Recognizing Ear Infections in Shih Tzus

Common signs in Shih Tzus

Because the dense ear hair can obscure visual signs, odor changes are often the first indicator of an infection in Shih Tzus. A sweet, musty, yeasty, or corn chip-like smell emanating from the ears is a strong early warning sign. Other signs include head shaking (often the most noticeable behavioral change), scratching at the ears with the hind paws, rubbing the ears against furniture or the floor, dark brown or yellowish discharge visible on the inner ear flap or around the canal opening, redness and swelling of the inner ear flap, sensitivity or pain when the ear is touched, and tilting the head to one side.

The hidden infection problem

One challenge specific to Shih Tzus is that the dense hair inside the ear canal can mask the severity of an infection. What appears from the outside to be a mild case may actually involve significant pathology deep within the canal, hidden behind the hair plug. This is why veterinary examination with an otoscope is particularly important in this breed. The otoscope can see past the hair to evaluate the condition of the ear canal walls and eardrum. If your Shih Tzu shows any signs of ear discomfort, a professional examination is more informative than a visual inspection from the outside.

The Shih Tzu Ear Prevention Protocol

Weekly ear inspections and cleaning

Clean your Shih Tzu's ears at least once per week using a veterinary-approved ear cleaner with ceruminolytic properties. Fill the ear canal with the cleaning solution, massage the base of the ear for 20 to 30 seconds to break up wax and debris, and allow your dog to shake. The shaking action helps bring loosened debris out of the canal. Wipe the accessible areas with cotton balls. Never insert cotton swabs into the ear canal. For detailed cleaning guidance, see our guide on how often to clean your dog's ears.

Regular grooming with ear hair management

Include ear hair management as part of your Shih Tzu's regular grooming routine. At minimum, have your groomer trim the hair around the ear canal opening to improve airflow. If your veterinarian has recommended ear hair plucking based on your dog's individual history, have this done professionally during grooming visits, typically every 4 to 6 weeks. Always follow hair removal with an ear cleaning to flush out any debris and reduce inflammation-related infection risk.

Keeping the ear area dry

After bathing (which is frequent in this coat-intensive breed), swimming, or any water exposure, thoroughly dry the inside of each ear with a soft towel and apply a veterinary-approved ear drying agent. The hair inside Shih Tzu ears holds moisture like a sponge, meaning that water that enters during bathing can remain in the canal for extended periods, promoting yeast overgrowth. Consider placing cotton balls loosely in the ear canal openings during baths to reduce water entry.

Managing allergies

If your Shih Tzu shows signs of allergic dermatitis (itching, paw licking, facial rubbing, recurrent skin infections), addressing the allergies is essential for controlling ear infections. Work with your veterinarian to develop an allergy management plan that may include anti-itch medications, allergy testing and immunotherapy, elimination diet trials for suspected food allergies, and environmental allergen reduction strategies. Controlling the allergic inflammation in the ear canal removes one of the most powerful perpetuating factors in the infection cycle.

Topknot and facial hair management

The long facial hair and topknot characteristic of the breed can trap moisture around the ear area. Keeping the hair around the ears trimmed shorter than the rest of the coat, or tying the topknot to keep hair away from the ear canal opening, can improve air circulation to the external ear. This is a simple grooming adjustment that can make a meaningful difference in ear ventilation.

Treating Shih Tzu Ear Infections

Step 1: Hair management before treatment

For treatment to be effective, medication needs to contact the infected ear canal tissue. If dense hair is blocking the canal, have your veterinarian or groomer carefully remove or trim the obstructing hair before beginning topical treatment. This step is unique to breeds like Shih Tzus and Poodles where internal ear hair is a significant physical barrier to medication delivery.

Step 2: Thorough cleaning

After hair management, clean the ear canal thoroughly with a ceruminolytic ear cleaner to remove accumulated wax and discharge. In severe cases or when the canal is heavily impacted with debris, a professional ear flush by your veterinarian under sedation may be necessary. Clean ears allow medication to reach the infected tissue and are essential for treatment success.

Step 3: Dual-action antimicrobial treatment

Shih Tzu ear infections frequently involve yeast with concurrent bacterial involvement. A treatment combining ketoconazole (antifungal) with chlorhexidine gluconate (antiseptic) addresses both pathogen types simultaneously, which is both practical and effective. This is particularly valuable for home treatment where simplifying the treatment routine improves owner compliance and treatment completion rates.

Step 4: Complete treatment and follow up

Continue treatment for a minimum of 14 days, even if the ears appear improved earlier. The hair in Shih Tzu ears can harbor organisms that are not fully eliminated by shorter treatment courses. Follow up with your veterinarian for ear cytology to confirm that the infection has fully resolved before discontinuing treatment. Premature cessation is a common cause of recurring ear infections in this breed.

Maintenance therapy

For Shih Tzus with a history of recurrent infections, maintenance therapy using a medicated ear cleaner once or twice weekly between clinical infections can significantly reduce recurrence rates. This ongoing, low-level antimicrobial treatment keeps yeast and bacterial populations below the threshold of clinical infection, even in the challenging environment created by ear canal hair.

Chronic Ear Problems in Shih Tzus

Left unmanaged, recurrent ear infections in Shih Tzus progress through the same chronic otitis pathway seen in other predisposed breeds. Repeated infections cause inflammatory damage to the ear canal walls, leading to epithelial hyperplasia (thickening), fibrosis (scarring), and progressive stenosis (narrowing). In an already narrow, hair-filled canal, this additional narrowing compounds the ventilation and drainage problems, accelerating the infection cycle.

Advanced chronic otitis in Shih Tzus can lead to ceruminous gland dysplasia, calcification of the ear canal, and in severe cases, the need for total ear canal ablation surgery. Preventing progression through consistent ear hygiene, hair management, and prompt treatment of infections is far preferable to managing end-stage ear disease.

Shih Tzu Ear Infections Compared to Similar Breeds

Several breeds share the Shih Tzu's ear hair problem, but the Shih Tzu's combination of factors makes their situation particularly challenging. Poodles also grow dense ear canal hair, but their upright ear carriage provides better external ventilation. Cocker Spaniels share the floppy ears and ceruminous gland issues but do not grow as much internal ear hair. The Shih Tzu's combination of dense internal hair, floppy external ears, brachycephalic canal structure, and allergy predisposition creates a multi-layered challenge that requires attention at every level.

Frequently Asked Questions

Q: Should I pluck the hair from my Shih Tzu's ears?

The answer depends on your individual dog. If your Shih Tzu has frequent ear infections and the hair is clearly contributing to the problem by trapping moisture and wax, careful, professional ear hair plucking can help. If the ears are generally healthy, gentle trimming of hair at the canal opening may be sufficient. The key principle is that aggressive, wholesale plucking can cause inflammation that triggers infections, so a gradual, gentle approach is always preferable. Discuss the best strategy with your veterinarian based on your dog's specific history.

Q: How often should I clean my Shih Tzu's ears?

Weekly cleaning is the recommended baseline for most Shih Tzus. Dogs with a history of frequent infections or with particularly heavy wax production may benefit from cleaning every 5 days. Always clean after bathing, swimming, or water exposure. During active infections, daily cleaning may be needed for the first few days of treatment. Avoid over-cleaning healthy ears, as excessive cleaning can strip natural protective oils and disrupt the ear's microbiome.

Q: Are Shih Tzu ear infections usually yeast or bacterial?

Malassezia yeast is the most common pathogen found in Shih Tzu ear infections, consistent with the breed's tendency toward oily skin and the warm, moist, wax-rich environment created by their ear hair. However, bacterial infections and mixed yeast-bacterial infections are also common. Ear cytology by your veterinarian can determine the specific organisms involved and guide appropriate treatment selection.

Q: Can I use cotton swabs to clean my Shih Tzu's ears?

Never insert cotton swabs (Q-tips) into the ear canal. In a breed with dense canal hair, the swab can push debris and wax deeper into the canal, compacting it against the eardrum and worsening the problem. Use cotton swabs only to clean the visible folds of the outer ear. For canal cleaning, use an ear cleaning solution that fills the canal, combined with the massage-and-shake technique, followed by wiping accessible areas with cotton balls.

Q: My Shih Tzu's ears seem fine between grooming appointments but get infected right after grooming. Why?

This is a common pattern in Shih Tzus and is usually related to ear hair plucking during grooming. The inflammation caused by plucking creates conditions that can trigger an infection within 24 to 72 hours. If this happens to your dog, ask your groomer to pluck less hair at each visit (small amounts more frequently rather than large amounts at longer intervals), and apply a medicated ear cleaner immediately after plucking. Alternatively, discuss with your veterinarian whether trimming rather than plucking would be more appropriate for your dog.

Q: Does the Shih Tzu's flat face contribute to ear infections?

Yes. Brachycephalic skull structure affects the anatomy of the ear canal, often making it narrower and less efficient at self-drainage compared to breeds with longer skulls. The altered canal geometry compounds the hair obstruction and ventilation problems. While you cannot change your dog's skull structure, being aware that it contributes to the problem underscores the importance of consistent preventive care.

Sources

Saridomichelakis, M.N. et al., 'Aetiology of Canine Otitis Externa: A Retrospective Study of 100 Cases,' Veterinary Dermatology, Vol. 18, 2007.

Angus, J.C. et al., 'Breed Variations in Histopathologic Features of Chronic Severe Otitis Externa in Dogs,' JAVMA, Vol. 221, 2002.

Miller, W.H. et al., Muller and Kirk's Small Animal Dermatology, 7th ed., Elsevier, 2013.

Merck Veterinary Manual, 'Otitis Externa in Dogs and Cats,' Updated 2024.

Related Reading

• Why Is My Shih Tzu So Itchy?
• Poodle Ear Infections: Ear Hair, Water, and Prevention
• French Bulldog Ear Infections: Narrow Canals and Chronic Issues
• Dog Ear Yeast Infection Treatment
• How Often Should You Clean Your Dog's Ears?

Emiel Maddens

Founder of Vetified. Develops topical antifungal and antimicrobial formulations for companion animals. Vetified products are listed on DailyMed and manufactured through FDA-registered facilities in the United States.