Matt,
I have varicocele on my left testicle pretty bad, and a more mild case on the right testicle. I’m unfortunate enough that it has caused some testicular atrophy, though it could be much worse. There was a time when my testicles were huge, now they’re just a little below normal in size; though, when the vericocele is inflamed, they can look pretty large. I’m sure you understand what I’m speaking about here. With my condition, I experience mild discomfort regularly throughout the day, and severe pain every once in a while. I’ve noticed that PE can inflame it and make the pain more frequent and cause the discomfort to last longer as the day goes by.
I’ve been PEing on and off for about a year (on and off meaning that I’ve gone months without doing a whole lot of anything), and it seems that my condition has grown a little more resilient to PE. However, it should be noted that since I’ve been getting back into PE on a regular basis, that the varicocele on the left side seems to be getting irritated. In fact, it’s throbbing with that little sharp pain as I type this.
I don’t really have a solution, but I can tell you what I do sometimes when it gets bad. I usually give my testicles a light massage after a PE session, and often when I’m taking a break during a PE session I’ll fill that time with kegels and a ball-rub. I also, this is rare because it’s so cold, I wrap a bag of ice in a thin clothe and hold it to my testicles. This seems to ease the pain associated with varicocele and may reduce the inflammation, though I can’t say for certain.
"Only enemies speak the truth; friends and lovers lie endlessly, caught in the web of duty". -Roland, in Stephen King's The Last Gunslinger