Greetings. It depends on the type of tattoo and whether done by amateur or professional. It also depends on the colour of the dye used and the depth at which they are placed. Most of the do's and don'ts are before and during a tattoo making, Post Tattoo, you should watch it for a few days closely to look for any foreign body type reaction.
Next Steps
Your dermatologist will decide a treatment plan for you after a consultation.