Dogs can develop cysts that can cause constant itching. Many of these cysts are the result of allergies or insect bites.
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Identification
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A cyst is a small nodule that can form on a dog's body but is usually not malignant. A tumor is larger than a cyst, and is often used to described cancer.
Contact Dermatitis
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Contact dermatitis is caused by an allergy and can cause cysts to form. These cysts can appear on the areas that come into contact with the allergen or where the hair is sparse. Contact dermatitis can cause chronic itching and hair loss. The most common treatments are avoiding contact with the allergen and medication such as antihistamines or steroids to control the itching.
Flea Bite Allergy
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Many dogs have an allergy to flea bites. This is caused by a reaction to the saliva of the flea and it can cause constant itching, redness, hair loss and infection. Flea control is an important aspect of treatment of flea bite allergies, as well as antihistamine medications to control the itching.
Hookworms
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A dog that has hookworms may develop cysts with intense itching. This condition is due to an infection with the hookworm larvae and can cause small red bumps on the dog's skin, abnormal nail growth and rough foot pads. Treating the dog for an intestinal infection usually causes the itching to subside. It may be necessary to move the dog to a different environment to prevent re-infestation.
Considerations
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If your dog has cysts that cause itching, consult your veterinarian for proper diagnosis and treatment.
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