I have been shot pretty much all over my body. 4 times for the hands, but not for Carpal Tunnel, that they operated. Yes, it will raise your sugar, it depends on how much of a dose he gives you, plus what kind of Steroid and exactly where.
I can't remember what my sugars where when I was shot in the hands but the last shot I got in my shoulder lasted 8 weeks and the second day my sugar rose to 430. Each day it will come down some however, I take insulin so I can help it come down.
When they shot my knee it takes three or four days for my sugar to rise, it's a different steroid.
all I can tell you is when he gives you the shots. go roller skating as much as possible to stay active. that will help the rise in sugar.