Davegb wrote:.... I am working on using a cock ring with the injections.....
Which rings are you trying? And how do you use them?
If you're going to be using any of the silicone or similar type I strongly suggest some manscaping, if applicable, as a pain avoidance measure. Of course it won't take long to figure that out on your own, probably once.
The brand I'm currently using is the "Perfect Fit" brand. I like them due to the material, thickness and shape. They're a good firm silicone but stretchable enough to get off while erect if necessary. Thick enough to feel better than the thin ones but not so thick that they get in the way. I pick a size that seems just a little small and then stretch it real good before use.
I'm assuming you're new to novelty cock rings but maybe not. I can opine further but it might be TMI for some readers. I may have already passed that threshold. I can PM if you want me to continue to opine on the topic.
Good luck.