A tattoo is a design created by inserting dark, endurable ink into the outer layer of the skin, also known as the dermis. This ink changes the pigment, that is the color of skin, to the one you want. Tattooing is essentially a body art form which is used to decorate the body with a variety of designs. Its believed that tattooing originated in Japan where the indigenous Ainu people used to paint their faces as part of their tradition. From there it spread to neighboring countries and was practiced worldwide.