Itchy skin and sore ears in dogs: causes and practical care

What to do now

Facial swelling with breathing difficulty, collapse or rapid worsening is an emergency. Call immediately for a suspected allergic reaction. Seek prompt assessment for painful, spreading or wet sores, pus, severe itching, marked swelling or a dog who seems unwell. A head tilt, loss of balance or unusual eye movements with an ear problem needs same-day advice.

Persistent scratching, licking or head shaking also deserves an appointment; do not wait until skin is broken. A single brief scratch in an otherwise well dog can be observed, but repeated symptoms should not be dismissed.

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Emergency? Call a vet now

Understand scratching, licking, redness, hair loss and ear problems, including safe observations, investigations and recurrence.

Veterinary help in your selected country

Phone your usual veterinarian; their recorded message should explain out-of-hours arrangements. If unavailable, contact a local emergency veterinary hospital. Confirm that it can receive your dog before traveling if possible; do not delay urgent care. Human emergency numbers are not veterinary helplines.

Open country-specific veterinary contacts

Understanding the signs

Itch may appear as nibbling paws, rubbing the face, licking the belly or chewing the back, as well as scratching. Saliva staining, broken hairs and bald patches can reveal activity that happens out of sight. Redness and odour may accompany inflammation or infection; darkened thick skin often reflects a longer problem. Shaking the head and a smelly or painful ear are not simply grooming habits.

Ear disease and skin disease can share an underlying cause. Appearance alone cannot distinguish allergy, parasites and infection.

Possible causes

Fleas and other parasites can cause considerable itch, including in a dog on a prevention programme if coverage or household control is incomplete. Environmental or food allergies may affect paws, skin and ears. Bacteria and yeasts can multiply on inflamed skin and worsen discomfort. Contact irritation, a foreign body such as an ear grass seed, wounds and some less common immune or hormonal disorders are alternatives.

Not all hair loss is itchy. Recurring ear infections may be a clue to allergy rather than a series of unrelated infections.

Safe practical steps

Photograph affected areas and record where itch began, seasonality, recent foods, shampoos, walks and parasite products. Check the prescribed prevention schedule and tell the vet exactly what was given; do not combine products or repeat doses yourself. Prevent rubbing or chewing with a suitable protective collar if tolerated and seek advice if it interferes with drinking or breathing.

Do not put cotton buds into ears, pluck painful ear hair, pour in oils, vinegar or peroxide, or use leftover drops. A damaged eardrum can change which treatments are safe. Avoid essential oils, human creams and unprescribed medicines. Keep bedding clean and avoid new fragranced products while awaiting assessment.

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What the vet may do

The vet may examine the whole skin and both ears, look with an otoscope and collect surface samples for microscopy. Scrapings or hair tests may investigate mites or fungal disease; other tests depend on findings. Parasites and secondary infection are usually addressed before more complex allergy work. A strict, supervised food trial may be needed to investigate food allergy; casual ingredient swapping is unreliable.

Treatment may include targeted parasite control, prescribed ear or skin medicines and itch management. Not every itchy dog needs antibiotics or an allergy blood test.

Recovery, recurrence and prevention

Reduced scratching and restful sleep are useful improvements, but finish the prescribed plan and attend rechecks. Return if redness spreads, pain appears or treatment is not helping. Allergic disease may require long-term management rather than a permanent cure. Agree a maintenance plan, including parasite control and any ear cleaning demonstrated by the vet. Avoid punishing licking: it is a sign to investigate, not misbehaviour.

Common questions

No fleas visible: can fleas still matter?

Yes. Fleas can be difficult to find and allergic dogs may react to small exposure. Ask the vet to assess prevention and other causes.

Does a smell prove infection?

Odour can accompany infection or wax and inflammation, but examination and sometimes microscopy are needed to choose treatment.

Can I change to a grain-free diet?

Do not assume grain is the trigger. A properly controlled veterinary food trial is more informative than repeated food changes.

Can I reuse ear drops?

Ask the vet first. The cause and eardrum condition may differ from the previous episode, making old treatment unsuitable.

Sources and editorial review

Sources below are in English. Clinical advice is general; veterinary services and treatment availability depend on your selected country.

Editorial evidence and language checks: 24 October 2026. This information cannot diagnose your dog. No independent veterinary clinical review has taken place.