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Understanding types of dog skin diseases with pictures helps pet owners recognize visible symptoms and take timely action. Common dog skin problems include allergies, mange, fungal infections, bacterial dermatitis, and hot spots. These conditions often appear as itching, redness, hair loss, flaky skin, scabs, or sores. Some skin diseases are triggered by parasites, while others are linked to food sensitivity or environmental factors. Visual identification plays an important role in deciding whether home care or veterinary treatment is required.