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Pyotraumatic dermatitis is caused by self-inflicted trauma to the skin, which is incited by pain or irritation, such as infestation with fleas or lice, [4] irritation from clippers, [3] allergic skin diseases, [4] diseases of the anal sacs, [4] inflammation of the ear canal, [4] foreign bodies or irritants within the coat, [4] or pain in muscles or joints. [4]
The condition of a dog's skin and coat is also an important indicator of its general health. Skin disorders of dogs vary from acute, self-limiting problems to chronic or long-lasting problems requiring life-time treatment. Skin disorders may be primary or secondary (due to scratching, itch) in nature, making diagnosis complicated.
The flea found most commonly on both dogs and cats with a flea infestation is the cat flea, Ctenocephalides felis. [2] Pets that develop flea allergy dermatitis have an allergic response to flea saliva injected during flea feeding. The itch associated with just one flea bite persists long after that flea is gone and leads to significant self ...
Flea allergy dermatitis is the most common skin disease of dogs in the United States. It is caused by sensitivity to flea saliva. [81] Food allergy* in dogs is commonly manifested as itching, especially of the face, paws, and the underside. Skin testing has proved unreliable, and a trial of a hypoallergenic diet is usually used for diagnosis. [82]
A dog that is repeatedly exposed to a particular allergen becomes sensitized to it, and the immune system overreacts to a subsequent exposure, most commonly manifesting in the form of skin irritation. [1] Some of the signs are redness, itching, hair loss, and recurring skin infections from the irritation. The dog may be more prone to scratching ...
Aside from these blisters, the dog may be mostly asymptomatic before the disease progresses further. [4] The blisters are easily ruptured and become painful upon doing so, [4] which can cause the dog to have difficulty eating. [15] As the disease progresses, the infected dog can become severely infirm, and may succumb to further infection. [4]