Avoiding jock itch and bruising egos....Help?🥴

So I’ve been having sex with my partner, and the last few times I noticed I have symptoms of jock itch afterwards. I’ve since treated it successfully. I’ve noticed that my partner has had symptoms of the rash and I’m not sure if he’s aware. He’s a sanitary guy but he basically lives at the gym and might have just summed his symptoms up as regular side effects of sweating.

I’ve been avoiding having sex with him because I don’t know how to have this conversation with him. How do I let him know that he has jock itch and it’s impacting me?? 🥴