reconstruction surgery and tattoos

I am 33 years old. I was diagnosed with breast cancer last year. I am finished with my chemotherapy and I have recently undergone complete bilateral mastectomies. I have chosen to do breast reconstruction with implants. I am finished with that as well and I am now ready for nipple reconstruction. I have the option to tatoo nipples onto the "breast" instead of going through another surgery (skin grafting to construct a nipple…)I have been through a total of 5 surgeries in the last year and I am not physically and psychologically up to going through another surgery right now. I really just want to be finished with this last step and try to look as normal as possible. I know there are halachic issues with tatoos and I was hoping you can help guide me.