Dreaming of tattoo's is a very posititive thing. A place I go to try an understand my dreams says the below:
A tattoo dream is all about definition. It indicates you are trying to define yourself and that has to represent you or somebody else who wants to be associated with positive energy, it is also a “symbol” of a spiritual journey. In short, the color, design, and placement of the tattoo have a specific meaning. The tattoo indicates that you need to be noticed. If you have encountered some difficult events recently then the tattoo dream indicates that even though things have been negative in the future those negative events are likely to melt away.
Onwards and upwards!! xx