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."

Fungal infection

Superficial fungal infestations occur as infections of the skin and nails. They are caused by fungi that are everywhere around us. Fungi thrive in warm, moist conditions. Fungal infection of a person’s scalp or body is sometimes called ringworm. There are, however, many forms of superficial fungal infection of the skin specific to the body areas that they affect. Fungi can be passed on quite easily from one person to another, but this does not mean that the fungus will necessarily infect the other person. Some people are more susceptible to fungal infections than others. In these people the presence of fungi on the body will result in fungal infections.