Eczema (dermatitis) is a common, non-infectious skin disease that can be caused by a variety of causes.
Eczema affects the epidermis (epidermis) and the uppermost layer of the underlying dermis, which is interlocked with the epidermis by small cones, the so-called papillae.
https://de.wikipedia.org/wiki/Ekzem (Wikipedia CC-by-sa-3.0)