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Skin rashes that occur throughout time and that are directly caused by contact with a particular type of irritant are often classed as chronic eczema in dogs. These conditions will occur throughout a dog's life but often become more obvious and chronic in nature as the dog matures or if it is ill or stressed. All breeds of dogs can have chronic eczema but breeds that are most known for the skin condition include the German Shepherd, Dalmatian and the hairless breeds of dogs such as the Chinese Crested and the Mexican Hairless. Some Basenji dogs that have very sensitive skin are also prone to eczema. [...]
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Pyotraumatic Dermatitis, also known as "hot spots", are severe skin irritations caused by trauma that a dog typically inflicts on his or her self. Attempts to scratch persistent itches, to bite at fleas, or to alleviate some type of pain result in painful trauma to the outermost layer of skin. Though this trauma is the most frequent cause of hot spots, hypersensitivity to parasites such as fleas or mites or allergic reactions to food or medications can also cause similar irritations. Ultimately, the trauma to the skin manifests as large, open lesions within a matter of hours. These lesions are typically a bright red, moist, and oozing sore that rapidly forms a crust surrounded by red, raised skin. Hair is lost from the affected area, but in any hot spot, the hairline is very clearly defined with a sharp edge. If left untreated, the lesion will spread very rapidly, and there is substantial pain associated with the area of the trauma. [...]
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