It is very important to keep your tattoo clean and moisturized. This decreases the chance for infection and helps the skin heal properly before the next working session.The number of working sessions you might need to finish your tattoo really depends on the design, the level of detail, the colouring, where the tattoo is being done, and the experience of your tattoo artist.
Some body parts, like wrists and ankles, need more time to heal between sessions.
The first tattoo session usually consists of line work. The filling and details are done during the subsequent sessions. As you will be exposing the area to continuous tattooing, the artist will monitor how quickly an area can heal before continuing.