Last month, I had an allergic reaction to some chigger bites sustained in our backyard on the night of July 4th.
One problem was the insane amount of itching that developed all over my legs, and eventually pubic region.
There was one afternoon in particular, after I had just woken up from a nap, that my "male organ" became extremely irritated, and it seemed to be on the inside...
No amount of scratching could help this condition, but it went away after a few days.