Help identifying type of skin trauma
Yesterday I had a girl with extremely sensitive skin come in and parts of the work reacted in a way I'd never seen before, she bled almost instantly and those parts look like they bruised. (Right side first picture) I told her I was sorry and I wasn't sure what happened but to keep me updated on the healing and to be careful treating that area.
I've been tattooing for over a year and while I have my decent share of bad first tattoos, I'm pretty confident now in my ability to give people decent works, I'll add some other pictures healed and fresh for reference. I've also tattooed that same area before so I don't think it's an area related issue. Anyhow, I wanted to ask more experienced tattooers if they've encountered the same kind of issue, or if they know exactly what it is, what could have caused it and if I should let her know any extra precautions in taking care of the piece. Thank you in advance!
Edit: immediately editing to avoid confusion, I did go through a regular apprenticeship in Italy which lasts a year in my region.