Shih Tzus are known for their large, expressive eyes, but one common issue that many owners face is tear staining. Tear stains appear as reddish-brown marks under the eyes and can make your dog’s face look dirty or unhealthy. This condition, often referred to as “acid tears”, occurs when excessive tearing oxidizes upon contact with air, leading to discoloration. While tear stains are not usually dangerous, they can be a sign of underlying health issues or improper grooming.
In this guide, we’ll explore the causes of tear stains, how to remove them safely, and the best ways to prevent them from returning.
What Causes Tear Stains in Shih Tzus?
Tear staining in Shih Tzus is typically caused by excessive tearing (epiphora), which can result from several factors:
1. Shallow Eye Sockets (Common in Shih Tzus)
Due to their flat-faced (brachycephalic) anatomy, Shih Tzus have shallow eye sockets, which can lead to poor tear drainage. Instead of draining through the nasolacrimal ducts, tears spill over onto the fur, leading to stains.
2. Blocked Tear Ducts
Sometimes, the tear ducts become partially or fully blocked, preventing tears from draining properly. This can be caused by:
- Congenital (birth-related) issues
- Infections
- Inflammation or scarring in the tear ducts
3. Eye Irritation or Allergies
Dust, pollen, smoke, or harsh grooming products can irritate the eyes, causing excessive tearing. If your Shih Tzu frequently rubs its eyes, allergies could be the cause.
4. Poor Diet and Water Quality
A diet high in artificial additives, grains, or poor-quality proteins may contribute to excessive tearing. Additionally, water high in minerals can increase tear staining. Using filtered water instead of tap water may help reduce the issue.
5. Teething (In Puppies)
Tear stains are common in Shih Tzu puppies because teething can stimulate excess tear production. This usually improves after 6 to 12 months of age.
6. Ear Infections
Surprisingly, ear infections can sometimes trigger excessive tearing due to the close connection between the ears, sinuses, and tear ducts. If your Shih Tzu has frequent ear infections, this could be contributing to the problem.
7. Yeast or Bacterial Growth
The reddish-brown stains under the eyes are caused by porphyrins, iron-containing molecules found in tears. When these stains stay moist, they create the perfect environment for yeast and bacteria to thrive, making the stains darker and smellier over time.
How to Safely Remove Tear Stains from a Shih Tzu
1. Clean the Tear Stains Daily
Regular cleaning is essential to prevent stains from setting in and becoming permanent.
- Use a soft, damp cotton pad or dog-safe wipes to clean around the eyes.
- Wipe gently from the inner corner outward, avoiding direct contact with the eyes.
- Dry the area with a soft towel to prevent moisture buildup.
2. Use a Safe Tear Stain Remover
There are special tear stain removers formulated for dogs. Look for products that are:
✅ Gentle and chemical-free
✅ Hypoallergenic
✅ Made with natural ingredients like chamomile or aloe vera
Avoid harsh chemicals like hydrogen peroxide or whitening agents, as they can irritate your dog’s skin.
3. Trim the Fur Around the Eyes
Overgrown hair can trap moisture and increase tear staining. Keep the fur around the eyes neatly trimmed using:
- Rounded-tip scissors
- A fine-tooth comb for precision
You can also visit a professional groomer for a clean and safe trim.
4. Change to Filtered Water
If your Shih Tzu’s tear stains worsen over time, try switching to filtered or bottled water instead of tap water. Minerals in unfiltered water can contribute to tear stain buildup.
5. Improve Your Dog’s Diet
A high-quality, grain-free diet may help reduce tear staining. Look for food that contains:
✅ Real animal protein (chicken, turkey, fish, lamb)
✅ Omega-3 and omega-6 fatty acids for skin health
✅ No artificial colors or preservatives
Some Shih Tzus also benefit from adding probiotics to their diet to improve gut health and reduce inflammatory responses that lead to excessive tearing.
6. Keep the Eye Area Dry
Moisture promotes bacterial and yeast growth, so always keep the area under the eyes dry and clean.
- Use a dry cotton pad or tissue after cleaning to absorb excess moisture.
- If your dog has excessive tearing, consider using cornstarch-based eye powder to keep the fur dry.
7. Visit a Vet if the Problem Persists
If your Shih Tzu’s tear stains become worse or are accompanied by redness, swelling, or frequent pawing at the eyes, consult a veterinarian. They may need to check for:
- Blocked tear ducts (which can sometimes be flushed)
- Eye infections or allergies
- Underlying health issues affecting tear production
Can Tear Stains Be Completely Prevented?
While you can significantly reduce tear stains, it may be impossible to eliminate them completely. Shih Tzus naturally produce more tears than other breeds, so some level of staining is normal. However, by maintaining a consistent eye-cleaning routine, feeding a high-quality diet, and keeping the eye area dry, you can keep tear stains to a minimum and ensure your Shih Tzu looks and feels its best.
Final Thoughts
Tear stains are a common issue for Shih Tzus, but with proper care, they can be managed effectively. Regular cleaning, a healthy diet, and good grooming practices will help keep your Shih Tzu’s face clean, fresh, and free from dark stains. If excessive tearing continues despite your best efforts, consult your vet to rule out any underlying medical issues.