For about a year, I have had the sensation of an abrasion on the underside distal end of my penis. Seems to worsen with sexual activity. I also have a raw feeling that I can only describe as originating in the urethra(?) in the last inch or so of my penis (I picture my urethra looking like Berlin in one of those old WW2 movies). Nothing appears out of the ordinary. I've seen a Urologist, Dermatologist, and general practitioner. Neither has identified a problem.
There is no question they missed something. I'm in my 40's...have a pretty close relationship with my penis.