Flea Allergy Dermatitis (FAD) is one of the most common skin problems in dogs. It’s an allergic reaction to flea saliva, where even a single bite can trigger intense itching. This condition is medically known as Flea Allergy Dermatitis.
Signs to Watch For
Dogs with FAD often show:
- Severe itching and scratching
- Red, inflamed skin
- Hair loss, especially near the tail and back
- Small bumps or scabs
- Constant licking or biting of the skin
- Secondary skin infections in severe cases
The itching is usually much worse than a normal flea infestation.
Why It Happens
When fleas bite, they inject saliva into the dog’s skin. Dogs with FAD are hypersensitive to this saliva, causing an exaggerated allergic reaction—even if only a few fleas are present.
Best Treatments
- Flea control: The most important step (spot-on treatments, oral medications, flea collars)
- Medicated baths: Helps soothe irritated skin
- Anti-itch medications: Antihistamines or steroids prescribed by a vet
- Antibiotics: If there’s a secondary bacterial infection
- Home cleaning: Wash bedding, vacuum carpets, and treat the environment
Recovery Time
- Mild cases: A few days to 1 week after flea control
- Moderate cases: 2–3 weeks
- Severe cases: Several weeks, especially if infections are involved
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