My H had a swollen testicle and pain/difficult urinating - about the same time I had some discomfort in my pelvis.
I asked him to go to a DR but he wouldn't. He said the testicle was swollen from a chemical he used. I have checked all over the web and can't find a chemical that would cause your testicle( epydidimitus) to swell. With his other symptoms, I think he may have Chlyamadia, an STD which means I probably do to. We've been married 31 yrs. and I have never been with anyone else - he says the same thing. Maybe that's why he won't go to the Dr. - he doesn't want me to find out he's been cheating.