The skin, an organ that covers the body, is threefold susceptible to diseases: first, because of its location; second, because of its dependence on the rest of the body; and third, because the skin itself is prone to poor functioning.
Mushroom attacks
Infestations of the outer layer of the skin (the epidermis) are usually caused by microscopic fungi that feed on dead cells and skin secretions. These fungi are prone to grow in protected moist regions, such as the armpits, groins, under the hair and feet.
Stinging and burns
Infestations of the skin by insects are rare today, but 50 years ago infestations by mites, lice and fleas were commonplace. The irritation produced by insects was so common that scabies, caused by the plowman who digs galleries in the skin, was simply called "itch" in some countries.
Itching is a non-specific response to any skin irritation. It may have psychological origin, or be produced by a sudden drop in temperature or excessive sweating.
