Pastern dermatitis is a collective term for an intractable, painful, exudative dermatitis affecting the back of the hose's pasterns. It is most frequently found on the non-pigmented (white-skinned) areas.
There are three different forms of pastern dermatitis with the mildest form the most common.
Mild form: Matted hair, minor swelling, scaling and crusting of skin
Exudative: Skin redness, skin erosion, hair loss, serous to purulent crusting of skin, vasculitis
Chronic Form: excessive granulation tissue (fibroblastic proliferation) that becomes cornified, nodular proliferations of hypereratosis and lichenification, painful lesions, lameness