Chronic ear infection in dogs
Otitis is the second most common cause of veterinary consultation in dogs. Can be acute (days) or chronic (weeks/months). Never use cleaner or medication without cytology — each type (bacteria, Malassezia fungus, mite) requires specific medication.
Information, not diagnosis. This guide is educational content reviewed by CFMV-registered veterinarians. It does not replace an in-person consultation. If your pet shows the emergency signs listed here, go to a veterinary hospital now.
🚦 Urgency triage: yellow vs red flag
🟡 Yellow flag — monitor / vet in 24-72h
- mild smell / increased wax / itching 1x day
🔴 Red flag — emergency NOW
- persistent head tilt / bleeding / pain on touch
Signs of otitis
- Dog constantly shakes head
- Scratches ear with paw
- Head tilted to one side
- Strong unpleasant ear odor
- Discharge (brown, yellow, bloody)
- Redness inside pinna
- Pain when touching ear (cries, bites)
- Hearing loss
Most affected breeds
- Cocker Spaniel (moist floppy ear)
- Labrador (frequent swimming)
- Golden Retriever
- Bulldog (narrow canal)
- Basset Hound
- Poodle (hair in canal)
- Shar-Pei (canal folds)
Treatment and care
| Type | Cause | Typical treatment |
|---|---|---|
| Bacterial | Bacteria (Pseudomonas, Staph) | Topical antibiotic + oral if severe |
| Fungal | Malassezia (fungus) | Topical antifungal + cleaning |
| Mite (Otodectes) | Parasite | Ivermectin + cleaning |
| Allergic | Atopy, food | Treat underlying allergy + topical |
| Foreign body | Seeds, hair | Removal under sedation |
Correct home cleaning
- Use ONLY vet-prescribed cleaner
- Fill canal (2-3 drops for small, 5-6 for large)
- Massage ear base for 30 seconds
- Let dog shake head
- Clean only VISIBLE part with cotton (never deep cotton swab)
- Do 1x/week if prone breed, or as vet directs
Itch has a cause, and the cause has an address
A coceira de Chronic ear infection é resposta imunológica, não mania. O corpo reage a algo que deveria ser tolerado, e a pele paga a conta: vermelhidão, feridas por lambida e infecções secundárias que chegam depois.
Para quem convive com Chronic ear infection, pele é o maior órgão e reage sempre do mesmo jeito, pouco importa a causa inicial. Por isso a investigação é processo de eliminação: alimenta, ambiente, parasitas. Cada etapa bem fechada encurta o caminho.
Na ficha clínica, Chronic ear infection aparece como medium. Guarde essa informação: ela decide entre 'marcar consulta' e 'ir agora'.
Mistakes that keep the pet scratching
- Over-bathing or using human shampoo, which dries the skin and worsens inflammation
- A 'middle ground' elimination trial: one treat breaks all 8 weeks
- Cutting steroids on your own once the flare improves
- Switching vets at every flare instead of following one continuous plan
Measuring progress without frustration
No manejo de Chronic ear infection, o progresso se mede em semanas, não em dias. Marque no calendário a reavaliação e escolha 2-3 indicadores simples (dor ao toque, frequência das crises, disposição no passeio) para acompanhar sempre do mesmo jeito.
O maior risco do tratamento de Chronic ear infection é abandonar cedo o que funciona devagar. Antes de mudar o plano, dê a ele o intervalo que o veterinário definiu; mudança sem intervalo não permite ler resultado nenhum.
E o critério de retorno continua o mesmo desta página: Persistent itching/odor.
FDA adverse event reports (US pharmacovigilance data)
The US Food and Drug Administration collects adverse event reports for animal medicines through its Center for Veterinary Medicine. The figures below come from that public database and reflect reports received, not confirmed side effects: a report does not prove the drug caused the reaction, and popular medicines naturally generate more reports.
Snapshot from openFDA (US government, public domain), dataset updated through 2026-07-02, queried on 2026-10-03. The total database holds 3,583 adverse event reports across all animal drugs.
| Drug | Adverse event reports | Most frequently reported reactions |
|---|---|---|
| Ivermectin | 194447 | INEFFECTIVE, HEARTWORM LARVAE (37191); Lack of efficacy (endoparasite) - hookworm (26113); Lack of efficacy (endoparasite) - heartworm (24396); Vomiting (23145) |
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Frequently Asked Questions
Can I use hydrogen peroxide to clean dog's ear?
No. Peroxide irritates inflamed tissue and can cause burns. Use only veterinary ear cleaners (Epi-Otic, MalAcetic).
Do dogs that swim a lot always get otitis?
Predisposition yes, but not mandatory. Drying ears well after swimming and bath with absorbent towel drastically reduces risk.
Does otitis spread to humans or other pets?
Bacterial otitis doesn't spread. Ear mites can transmit to other dogs/cats via direct contact. Malassezia isn't transmissible.
How much does otitis treatment cost?
Consult + cytology: $50-150. 15-day topical medication: $30-80. Oral antibiotic if needed: $40-100. Typical total: $120-330.
Does recurrent otitis always come back?
Only if underlying cause isn't treated. Allergic otitis returns until atopy is treated. Predisposing anatomy may require permanent care.
At what age does Chronic ear infection show up?
Per the clinical profile on this page, the typical onset age is Any. Predisposed breeds can show signs earlier, and early screening changes the prognosis.
How severe is Chronic ear infection?
Chronic ear infection is classified as: medium. That rating sets how fast you need care; severe cases have no safe waiting period at home.
When should I take my pet to the vet for Chronic ear infection?
The practical reference on this page is: Persistent itching/odor. If you're torn between 'watch' and 'go', go: nobody regrets checking early.