I honestly never figured out with certainty what it was. It started after playing soccer when I was about a month or two into my novice LP. At the time I didn't know whether it was from soccer of squatting, but I finally figured out that squatting wasn't the primary irritant. One day I even woke up with a painful bulge that I pressed back into my body (was right above my hip crease on the right side). That never happened again. Cutting firewood with a chainsaw, shovelling snow, stuff like that would make it very bad for a couple of days, and it would hurt in my right testicle sometimes, so I figured it was a small inguinal hernia. With a lot of stops and starts, I was able to finish my LP, do a little intermediate work, then it flared up again badly. So I basically did (olympic) weightlifting and kept my squat around 300 and deads around 380 for awhile. Got insurance during that time and the doc felt all around and couldn't feel anything w/ certainty, so we did an scan (ultrasound, I think, can' t remember now). After the scan the surgeon said he was certain there was no hernia. He said it was probably something muscular and offered to refer me to a PT but I declined. By this time I'd laid off everything that aggravated it for so long and had been lifting moderately heavy weights consistently that I rehabbed whatever it was pretty well. So I starting trying to push PR's again.
A couple of weeks ago I aggravated the injury a little bit while shoveling snow. My best description is some muscle or tendon in my groin area becomes inflamed by repetitive "bending over" activity. I've learned if I have two hours of chainsaw work to do I have to break it into hour chunks, and take a long break in between. Shoveling snow really screws with it.
The only thing that I can't explain consistently was the bulge I pushed back in that one morning.
But if I did get a hernia diagnosis, I'd have it surgically repaired asap. I did a lot of reading when I was sure I had one, and the consensus was that you can work around it for years, but it will impede your training significantly and eventually need to be repaired anyway, so you might as well go through the hassle, the layoff, the rehab, and then lift heavy with confidence.