Changes

===Clinical Signs===

===Clinical Signs===

Signs are often, but not always seasonal. Pruritus is the key feature of atopic dermatitis and may be the only complaint. This gives rise to self-trauma, causing lesions. opecia, erythema, scaling, salivary staining, hemorrhagic crusts, excoriations, lichenification, and hyperpigmentation.The feet, face, ears, flexural surfaces of the front legs, axillae, and abdomen are the most frequently affected areas. Lesions develop secondary to self-trauma and include a Superficial staphylococcal pyoderma, Malassezia dermatitis, and allergic otitis externa with secondary infections are common complications. Chronic or recurrent otitis is the only complaint in a small number of animals.

Signs are often, but not always, seasonal. Pruritus is the key feature of atopic dermatitis and may be the only complaint. This gives rise to self-trauma, causing lesions. Lesions can include alopecia, erythema, scaling, crusting, excoriations and salivary staining. With time, lichenification, and hyperpigmentation develops. Certain areas of the body are affected more frequently than others: the feet, face, ears, axillae and vental abdomen are predilection sites. Secondary infections such as superficial staphylococcal pyoderma and Malassezia are common. A small number of cases may present only with chronic or recurrent otitis externa.

===Laboratory Tests===

===Laboratory Tests===