I naturally have think greasy skin, so over the years it has been subjected to some fairly rough treatment.eg My skin care professional used her medical grade microderm machine at highest setting, and I emerge looking just a little flushed.
I have had a blue peel in the past; gave the same kind of side effects, but for a shorter period of time, and without the long-term skin improvements, so I was of the mind set that quick fixes hadn't worked, so I was going to give the nu-derm a fair try. I also knew that if this didn't get rid of the sun damage spots I would be considering surgery, and that would probably leave some scars.
There are times when it is a little painful, bit like sun-burn level of pain, and it tends to cycle through skin getting tighter and hotter for a few days, then peeling off for a few days, repeat for at least 16 weeks. The issue you will have if you have a job where you have to face people is that it is almost impossible to hide with make-up. I tried green tinged bases to tone down the red, but when they combined with the flakes of skin hanging off your face by mid-afternoon, it really wasn't a good look.
I timed it so I was working on a small, men only project team and they were all to petrified it was a weird girlie thing that they didn't know about, that not one of them mentioned it!
To answer your question, I don't think my skin is any more sensitive after than before, but I am religious about using a factor 50 base EVERY day nowadays, so difficult to say really.
And yes, my dermatologist prescribed for me (some parts of the "hard-core" regime have to be prescribed by Doctors in UK) and he then reviewed with me after 6 wks, 20 wks and thereafter whenever I wanted.
Shout if you think of other questions, I know it can be a bit scary.