Dermatitis in dogs can be recognised by itching, scabs and scaly skin, according to WebMD's Healthy Pets section. Licking at the paws, face-rubbing and sneezing as well as a runny nose and watery eyes are often the first sign of the disease.
Atopic dermatitis is a disease that develops through exposure to allergens that are either inhaled or absorbed through the skin, states WebMD. This very common condition, second only to flea allergy dermatitis, affects approximately 10 percent of all dogs. Severe signs include large scabs, hair loss and bacterial infection. Other signs include ear canal infections and inflamed ear flaps.
Dermatitis often appears in dogs aged 1 to 3 years, states WebMD. The most susceptible breeds include golden and Labrador retrievers, Lhasa Apsos, wire fox and West Highland white terriers and dalmations. Other affected breeds include poodles, English and Irish setters, boxers and bulldogs, among others. However, other any dog, including mixed breeds, can be affected by the condition.