Those “cuts” on your dog’s ears are rarely actual cuts. In most cases, they’re either a normal anatomical feature, the result of self-inflicted scratching, or a skin condition that creates splits and sores along the ear margins. Understanding which one you’re looking at helps you figure out whether it’s harmless or needs attention.
It Might Be Henry’s Pocket
If what you’re seeing is a small slit or fold on the inner side of the ear flap near its base, that’s not a cut at all. It’s a normal anatomical feature called Henry’s pocket, a small pouch of skin found on most dogs and cats. Its exact purpose isn’t fully understood, but the leading theory is that it helps dogs locate sounds more precisely by changing how the ear catches and channels sound waves. Another possibility is that it adds flexibility to the ear flap, making it easier for dogs to fold or rotate their ears. Either way, it’s completely normal and nothing to worry about.
Self-Inflicted Damage From Itchy Ears
The most common reason dogs develop real wounds on their ears is their own scratching. When something irritates the ear canal, whether it’s an infection, allergies, or parasites, dogs respond by shaking their heads violently and raking their hind claws across the ear flap. This can split the thin skin along the ear margins, creating cuts, scabs, and open sores. Cornell University’s veterinary program notes that intense scratching can cause visible scratch marks, open sores, and even burst blood vessels inside the ear flap (called a hematoma), which creates a puffy, swollen appearance.
Ear mites are a classic trigger for this cycle. These tiny parasites cause intense itching and produce a dark, waxy brown discharge inside the ear canal. The itching drives dogs to scratch and shake so aggressively that the physical trauma to the ear flap becomes worse than the mite infestation itself, sometimes leading to secondary bacterial infections or fluid-filled swelling of the pinna.
If your dog is scratching at their ears frequently, the “cuts” you see on the outside are likely collateral damage from whatever is bothering them on the inside. Treating the underlying itch stops the cycle.
Fly Strike on Ear Tips
Dogs that spend a lot of time outdoors, especially in warm months, can develop painful sores on the tips and edges of their ears from biting flies. Flies target the ears because the skin is thin and blood flow is close to the surface. Repeated bites create raw, bleeding wounds that attract even more flies, and the damage can escalate quickly. Signs include redness, swelling, crusty scabs along the ear edges, and sometimes a foul smell from infected wounds.
Fly-repellent ointments designed for dog ears can help break the cycle. Products containing pyrethrins (a natural insecticide derived from chrysanthemums) are widely used, and natural options with citronella, cedarwood, or lemongrass oil can also deter flies while soothing existing bites. Keeping your dog indoors during peak fly activity and cleaning wounds promptly prevents the problem from worsening.
Ear Margin Skin Conditions
Some dogs develop a condition called ear margin seborrhea, where the edges of the ear flaps become dry, flaky, and cracked. The skin along the margin thickens, develops greasy or waxy scales, and can split open in ways that look like small cuts. Dachshunds are particularly prone to this, though any breed with long, floppy ears can be affected.
A more serious possibility is vascular necrosis of the ear margins, where poor blood flow to the ear tips causes the tissue to die. This starts as scaly, thickened, darkened skin at the tip of the ear and progresses to open ulcers that can eventually change the shape of the ear margin. It’s rare, but it can be triggered by immune system problems, cold exposure (frostbite), reactions to certain medications, or underlying infections.
Certain breeds also have a higher risk for sebaceous adenitis, a condition that destroys the oil-producing glands in the skin and often shows up first on the ears. Standard Poodles, Akitas, Samoyeds, Vizslas, Havanese, Springer Spaniels, and Lhasa Apsos are predisposed.
How to Tell What You’re Dealing With
A quick checklist can help you narrow things down. If the “cut” is a clean slit near the base of the ear that doesn’t bleed, hurt, or change over time, it’s almost certainly Henry’s pocket. If you see fresh scratches or raw spots combined with head shaking and ear scratching, the damage is self-inflicted and something inside the ear needs attention. Crusty, bleeding edges concentrated on the ear tips in a dog that lives outdoors point toward fly bites. And dry, scaly, cracking margins that worsen slowly over weeks suggest a skin condition like seborrhea or a vascular issue.
For anything beyond Henry’s pocket, a vet visit helps pin down the cause. Ear infections and mites are straightforward to diagnose with an ear swab. Skin conditions that cause chronic, non-healing sores along the ear margins sometimes require a small skin biopsy to distinguish between immune-mediated disease, infection, and other causes. Getting the right diagnosis matters because treating a fungal infection the same way you’d treat an autoimmune condition won’t help, and the ear will keep breaking down.