THE TATTO THE TATTO

T attoos are created by inserting colored materials inside the skin's surface. The first tattoos probably were created by an accident.Someone had a small wound, and rubbed it with soot and ashes from a fire.Once the wound had healed, they saw that a mark stayed permanently.

the word "tattoo" is a borrowing of the Samoan word tatau, meaning to mark or strike twice (the latter referring to traditional methods of applying the designs).
The first syllable "ta", meaning "hand", is repeated twice as an onomatopoeic reference to the repetitive nature of the action, and the final syllable "U" translates to "color".

Tattooing has been a Eurasian practice at least since Neolithic times. dating from the fourth to fifth millennium BC, was found in the Ötz valley in the Alps and had approximately 57 carbon tattoos consisting of simple dots and lines on his lower spine, behind his left knee, and on his right ankle. Other mummies bearing tattoos and dating from the end of the second millennium BC have been discovered at Pazyryk on the Ukok Plateau.

Tattooing in Japan is thought to go back to the Paleolithic era, some ten thousand years ago.Various other cultures have had their own tattoo traditions, ranging from rubbing cuts and other wounds with ashes, to hand-pricking the skin to insert dyes.
is what wiki say..