Ah, it's possible it was a mental thing, I was really stressed out at the time.
There was this time back in 2009 where I had to lay in bed for a few days as jolts of pain ran down the left side of my testicles and down the thighs. Couldn't go see a doctor (our financial troubles were really that bad) so I left it alone. Before that I always had this "full" feeling in my genitals, but afterwards everything felt empty and less sensitive. I could no longer feel contractions when trying to do kegels, so I gave up. I had this "tennis ball" sensation that seems like it's a symptom of piriformis syndrome, but stretching didn't help at all.
So in my three year quest to restore sanity/erection quality, I tried a number of things. The first thing included a cheap pump (financial troubles...) that I used for water pumping. It brought blood back into the shaft and kept it from being starved of blood.
Then I tried to retrain myself by focusing on the the old sensations, like kegeling. "Okay, I can stop myself from urinating, so that means I can kegel. Okay, I can feel the contraction with my hands. Okay, I can feel the contraction without my hands..."
And recently, what seemed to help a lot, but was totally accidental because I was searching for lube, was Tiger Balm.
That stuff burns like a mofo, but it seemed to wake up my nerves! Even the blood flow in my shaft returned to normal, and that tennis ball sensation is no longer there. (I don't recommend using it often though, ow)
I'm back to doing the [words=http://www.mattersofsize.com/forum/penis-enlargement-newbie-forum/1597-dlds-first-routine-i-gained-2-inches-with-this-routine-full-tutorial.html]Newbie Routine[/words], simple stretches, jelqs, and warm ups are the best. I've always wanted to purchase a [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]
Bathmate[/words], but I'm currently focusing on reaching my financial goal asap before I splurge on any equipment.
Well, I'm glad to be injury free and back in the game. Thanks DLD!