Allergies. An allergic reaction is among the most common causes of itchy hands and feet. It could result from something you eat or touch. The response seen or felt can be characterized as another variant of eczema known as allergic contact dermatitis.
Bullous pemphigoid is an uncommon skin condition that affects dogs, and is characterized by the appearance of fluid or pus filled blisters, and severe open sores on the skin and/or mucus-lined tissue of the mouth.ullous pemphigoid is found in two forms: the common blister (bullous) form and the relatively rare long-term (chronic) form. The bullous form is characterized by open sores, short-term blisters, and circular lesions on the top layer of skin.
Rashes Caused by Scabies. Scabies, or sarcoptic mange, is caused by microscopic mites living under the surface of the skin. On a dog, the rash appears as bumpy, raised, and extremely itchy patches of skin. When humans contract scabies, the rash appears on the chest and stomach areas in the form of tiny, red spots.