Skin Skin is waterproof, stretchable, comes in a range of thicknesses and colours, is self-repairing and easy to look after. We only see the top layer, the epidermis, which is always renewing itself. Old skin falls off in tiny flakes that we don't notice. In the next layer down, the dermis, sweat glands produce a liquid that comes to the surface and evaporates to keep us cool, while nerve endings tell our brains what something we're touching feels like or if we're being hurt.
Skin needs to be kept clean.
Washing all over with soap and water every day helps make sure that pores don't get blocked and cause spots. You could actually slow down the healing or even cause a scar. Washing also makes you more pleasant to be with. If you don't wash - you start to smell. Melanin is what gives skin its colour and also protects it from the sun.