Skin

"The skin is the largest organ of the body, with a total area of about 20 square feet. The skin protects us from microbes and the elements, helps regulate body temperature, and permits the sensations of touch, heat, and cold.
Skin has three layers: The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone.
The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands.
The deeper subcutaneous tissue (hypodermis) is made of fat and connective tissue.
The skin’s color is created by special cells called melanocytes, which produce the pigment melanin. Melanocytes are located in the epidermis."

Eczema

Eczema is also known as atopic dermatitis, or atopic eczema (the most common form of eczema). Atopic eczema mainly affects children, but it can continue into adulthood or start later in life. Eczema is a chronic skin condition in which the skin becomes itchy, reddened, cracked and dry. It affects both males and females equally, as well as people from different ethnic backgrounds.