Itchy skin and hair loss in dogs typically result from allergies, parasites, or infections. These conditions cause excessive scratching, leading to bald patches and skin irritation.
Allergies top the list, including environmental triggers like pollen or food sensitivities. Flea bites, bacterial infections, and fungal issues such as ringworm also contribute. Hormonal imbalances, like hypothyroidism, can weaken skin and fur health.
When a dog's immune system overreacts to an allergen, it releases histamines, causing inflammation and itching. Scratching damages the skin, leading to hair loss. Parasites like fleas or mites irritate the skin, while fungal infections thrive in warm, moist areas, worsening the condition.
| Type | Key Features | Common Treatment |
|---|---|---|
| Allergic Dermatitis | Red, inflamed skin; seasonal flare-ups | Antihistamines, hypoallergenic diets |
| Flea Allergy Dermatitis | Localized itching near tail base | Flea prevention, medicated shampoos |
| Ringworm | Circular bald patches, scaly skin | Antifungal creams, oral medications |
If symptoms persist beyond a week, consult a vet to rule out serious conditions. Early intervention prevents chronic skin damage and secondary infections.