JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Eczema. Artwork depicting a section through the epidermis of human skin affected by eczema. Eczema is a skin inflammation characterised by an itchy pink rash and crust on the skin. Fluid accumulation is seen between the cells of the epidermis (pink folded layer) causing spongiosis (separation of the cells). Clumps of epidermal cells have disintegrated to form large yellow vesicles containing inflammatory cells. These vesicles can rupture onto the surface of the skin forming crusts. In the bottom layer (the dermis) blood vessels are dilated. Eczema is often caused by an allergy but can occur for no apparent reason.
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