Is It Normal for Dogs to Have Brown Marks Under Eyes?

What Causes Brown Marks Under a Dog’s Eyes?

Brown marks under a dog’s eyes are frequently due to natural pigmentation or tear staining. Some dogs, especially those with lighter fur, may develop dark discoloration around the eyes from tears drying and leaving behind pigments. This is more common in small breeds or dogs with short muzzles, where tears can’t drain properly and accumulate near the nose.

The pigmentation around the eye area can also be genetically determined. While the passages do not explicitly mention under-eye pigmentation, they do confirm that eye color and surrounding tissue can vary by breed. For example, some Northern breeds and dogs with the merle pattern may have unique eye features, including odd-eyed appearances, suggesting that pigmentation variations are normal in certain lines.

Tear Staining and Eye Health

Tears are produced by glands near the eye and help keep the cornea moist. In some dogs, excess tears can overflow and stain the fur beneath the eyes, leading to brown or reddish marks. This is known as tear staining and is often harmless but can be a sign of underlying issues if it worsens or is accompanied by discharge, redness, or swelling.

The passages note that the conjunctiva — the pinkish membrane covering the eye — contains blood vessels and nerve endings. If this tissue becomes inflamed, it may appear red and swollen, which could indicate irritation or infection. However, the presence of brown marks alone does not confirm inflammation or disease.

When to Be Concerned About Eye Marks

While brown marks are often normal, sudden changes in appearance — such as darkening, spreading, or the development of discharge, redness, or squinting — may signal a health issue. The passages emphasize that the eye is a sensitive organ protected by muscles and fat, and that injuries or foreign bodies can be hard to detect due to tight eyelid closure.

If you notice any of these signs, it’s best to consult a veterinarian. The Dog Owners Home Veterinary Handbook notes that the eye has multiple protective layers and functions, and any disruption to its normal appearance should be evaluated professionally.

Breed-Specific Considerations

Certain breeds are more prone to under-eye discoloration due to their anatomy or genetics. For example, Dachshunds and other small breeds may have tear staining due to facial structure. The Dogist features several dogs, including a Dachshund named Lola, indicating that such features are commonly observed across breeds.

While the passages do not list specific breeds with higher rates of under-eye marks, they do confirm that eye features — including pigmentation and eye color — vary naturally among breeds. This supports the idea that some degree of discoloration is normal and breed-related.

Maintaining Eye Hygiene

Regular cleaning around the eyes can help reduce tear stains and prevent irritation. Use a damp cloth to gently wipe the area daily, especially in breeds prone to staining. Avoid using harsh soaps or chemicals, as the eye area is sensitive.

The passages do not recommend specific cleaning methods, but they do highlight the importance of protecting the eye’s surface and maintaining its natural moisture balance through tear production. Keeping the area clean helps prevent secondary infections and keeps the dog comfortable.