An acute or chronic skin inflammation characterized by erythema, papules, vesicles, pustules, scales, crusts, scabs, and possibly itching, is known as

The symptoms you have listed are describing ECZEMA. There is no exact cause of this skin condition, however, it could possibly come from your genetics or your body's immune system overactive response to something irritating that came across it such as a type of food you eat. 

Let me know if you need anything else. 

                         - Dotz

Ifound this on google “aristotle (384–322 bc) in western scientific taxonomy the greek philosopher aristotle was the first to classify all living things, and some of his groups are still used today, like the vertebrates and invertebrates, which he called animals with blood and without blood.” i hope this you for what your looking for.