As regards the difference betweeen humiliation and embarrassment, I think that I can give an example.
when I was young and I have physicals in schools, I was embarrassed to undress until underweear, at that time, the last 50's and beguinning 60's it was only white briefs, in a locker room in front of classmates and a monitor or the PE teacher, I was of course also embarrassed during the physicals because of the presence of a nurse and a lady doctor even if I did not prefer to have a male doctor who could be more rough with us.
If my mother was present during a medical exam at a doctor's office, I was also embarrassed but it did not occur often in my memory.
When I was 18 age, I had to go to a pre-induction center for physicals to know if I was fit for the mandatory military service.
Here we had to take first a gang shower in a large group standing naked so closely to each other that we could not avoid to touch the chjeeks of the guy who was in the row before or being touched by the guy who was in the row behind, all under the control of sergeants, that was humiliating.
Then, we underwent the physicals undressed for nearly a morning, we were naked in a large group without any privacy, any respect of our feeling of modesty,we were examined in plain view of each other and of a lot of persons present in the corridor where we should stand lining up completely naked before entering the large exam room or in the exam room itself: sergeants or officers, medics, doctors, we were permanently hurried up, bawled out, and ordederd to obey all instructions without discussion and without asking any question.
Some intimates exams such as check hernia, examination of penis and balls, visual inspection of the rectum, digital rectal area being on all fours on a medical table, were performed in a large exam room with many spectators. And when waiting for our turn, some of us recieved a slap at the buttocks by sergeants or also by doctors during the examination when instructed to turn around or to bend over or after to straight up again and a real whack at the end of the examination.
that was really humiliating!
So for me, there is a great difference between an embarrassment and a humiliation in medical exams