Bumps on my partners dick??

I’ve noticed that whenever I have unprotected with a guy, their dick feels irritated and they have these little tiny red bumps along the head. It hasn’t happened with every guy, but I noticed it with one guy I was with two years ago (he said it didn’t cause any irritation when he pees or anything, the bumps just worried him) and now currently with my partner now — the bumps do irritate him a little and he even has a little tear on the head. & it hurts a little when he pees. The day we started going raw, we tried this new lube and he may think he’s allergic to it and may have a uti too but idk because ive had a situation with the first guy where he got the same bumps in the exact same place! And I don’t have any stds and am regularly checked and my results keep coming back negative!