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Skin and allergy · Updated 2026-09-21

Canine atopic dermatitis

A chronic itchy skin condition associated with environmental allergens and a weakened skin barrier.

Prompt veterinary attentionDogs
Veterinary examination relevant to canine atopic dermatitis
Visual guide to warning signs including breathing difficulty, appetite loss, vomiting, mobility change, abnormal droppings and collapse
Changes in breathing, appetite, movement, digestion or alertness can need veterinary assessment. Collapse and breathing difficulty are emergencies.

Signs to watch for

  • Persistent itching
  • Licking paws
  • Red ears or skin
  • Recurrent skin infections
  • Hair loss

Causes and risk factors

Genetics, environmental allergens and skin-barrier dysfunction interact; fleas, food reactions and infections can produce similar signs.

How veterinarians diagnose it

A veterinarian rules out parasites and infection, reviews seasonality and response to treatment, and may use allergy testing to plan immunotherapy rather than to diagnose itch alone.

Treatment and management

Long-term care may combine parasite control, skin care, infection treatment, prescription itch relief and allergen-specific immunotherapy.

Prevention

Consistent parasite prevention, early flare management and veterinarian-approved skin care can reduce severity.

Outlook

Usually lifelong but often controllable with an individual plan and regular reassessment.