Many skin disorders in dogs are collectively referred to as dermatitis, which is caused by skin allergies. There are also several different triggers of skin allergies. Some reactions can be severe or chronic, producing painful and unsightly scabs.
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Environmental Factors
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Allergens that produce skin allergies in dogs are found in bedding, carpeting and other soft surfaces in the home. Outdoors, a dog may come into contact with potential allergens from grass, lakes, ponds, streams and swimming pools. Even exposure to rainwater can cause skin allergies in some dogs.
Food Sensitivities
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Foods that commonly produce skin allergies include corn, wheat, Brewer's yeast, meat by-products and artificial flavors, colors and preservatives.
Infectious Diseases
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A fungal, yeast or bacterial infection can easily produce canine skin allergies. Infectious diseases, such as ringworm, warrant immediate medical attention from a veterinarian.
Parasitic Infestations
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Fleas are a leading cause of skin allergies with scabs on a dog. Ticks and mites cause similar problems.
Neurogenic Conditions
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Skin allergies in dogs that are neurogenic in origin, meaning self-inflicted, sometimes occur after suffering an injury or other trauma. This condition is characterized by constant licking of the area, followed by the development of rash, hair loss and scabs.
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