According to TMZ, Lindsay Lohan had started to get some ink done before she got locked up but she didn't have time to finish the design ... because of that whole jail thing.
At first glance, it appears to be a bruise on LiLo's upper left arm -- but the mark is actually the tattooed outline of a little girl with her eyes closed.
We're told Lohan first went under the needle at the Shamrock Social Club tattoo parlor in Hollywood just a few weeks ago -- and ironically chose the image because "she liked the innocence of the girl."
