Okay, that even tops the one I saw on TLC (which does not involve nutsacks, or even anything in that specific region).
A self-described handyman is doing some yard work when he falls out of a tree and breaks his leg. Being a thrifty sort of guy, he decides to forgo the cost of a trip to the doctor, and uses a heavy sock, a bucket, and some quick-dry cement to make a cast all by himself.
What he doesn't realize is that cement, as it dries, is rather - caustic. Several days later, running a high fever and in pain that he describes somewhere under 5 on the 1-10 scale, he takes himself to the ER. I forget how they managed to get the cement off of him, but it had a) eaten through the heavy sock, and b) given him severe chemical burns. However, it didn't look infected, which is normally the reason for a severe fever. The doctor inquired further.
Turns out that he'd hit a branch on the way down, and torn open his side. He'd fixed that too - with make-shift 'stitches' of copper wire. That was badly infected, requiring immediate hospitalization, far beyond what he would have required for going to the ER when the incident occurred.