How much of buttock should be revealed to the nurse during the intramuscular injection?

What does it matter who sees what? Nurses have probably seen more butts than you've had hot dinners. How do you think a man who has been catheterized feels? Do you think I loved having my penis examined and walking around with a nice bottle of urine as my constant companion. And I had to roll over with a bare but so the incision could be examined (12" long) 8 times a day. Pride and modesty went out the door on day 2 of 12. :)

You can bet we've seen many many butts and could care less what yours looks like. We need to see the buttock, because the sciatic nerve runs down thru it and we have to see landmarks to be sure we aren't near it. We don't do it for the thrill we get looking at your butt.

I take weekly intramuscular (IM) injections. Ideally, you can stand up, pull down one side of your pants and drawers and stand with your knees bent and toes on the floor on the side she is going to give you the shot in. She uses her forefinger and thumb to make an L on your hip. The forefinger is on your hip bone and she gives the shot where her thumb is. Trying alternately squeezing and relaxing your buttocks and you will feel the muscle she is injecting into. It runs diagonally from your hip to your lower spine.
It is really necessary and she is a nurse, a professional. Don't be embarrassed.