I mentioned earlier that I had the same type of lingering discomfort after Trimix injections. I asked my urologist to prescribe a low alprostadil compound which has greatly reduced the discomfort level. There’s still a little there, but it’s easily tolerated (unlike before). Haven’t tried Bimix yet, so not sure if that works as well. My isssue remains that the Trimix is not quite as effective as I’d like. So after injecting, I use a vacuum erection device to get me to my happy place. Good luck.