I agree. Dermarolling is not a good treatment especially if you have thin skin.
A dermatologist did it to me and said there can be nothing damaging in the treatment, thus I thought it was ok to try. It was bad idea. Cycle of the worst choices of my life started there...
My skin dryness was able to recover from that but skin aged/stretched because of that treatment.
I used to look younger/same age like my 6 year younger friends. All of the sudden I looked older than 10 years older friends.