Penis pain is the worst. Your doctor isn't recommending a specialist to see and just saying 'oh well'? That's not good medicine! So, is this on the surface level of the penis or inside of the penis where you are having the pain? Is it constant or when you touch it or when you urinate? Describe it a little more and we'll see if we can come up with some ideas for you.
Sounds a little bit like some kind of nerve pain. That's the specialist I'd go to next if the derm doesn't help you.
Nothing that is new that you could be allergic to? No new body cream, laundry detergent, etc.?
We need to know if the pain is internal or external to really be able to help. Your post doesn't really describe it enough to say what type of specialty.
Good advice from AnnieBrooke & GuitarRox. I think as Annie suggested, it's possible that you developed an allergy to the lube over time. Also, do check the ingredient listing carefully - not sure if you knew exactly what USED to be in it, but sometimes mfr's do change their formulas - ironically because some components could be more likely to cause allergies. They could've changed one that didn't bother you for one they thought was 'safer', but now the new one causes problems for you.
A couple other things that come to mind - 1) The 'satiny boxers' you wear - I have found I'm slightly sensitive to certain synthetic fabrics that, even though they feel soft & silky & comfortable at first, begin to irritate me after awhile. 2) What type of grip pressure do you use when masturbating? A lot of guys get into the habit of using a very tight grip & masturbating quite vigorously. That can cause problems when having sex w/ a partner because you've become accustomed to a lot of pressure & intercourse usually doesn't generate the same feeling. But also, I'm thinking a very tight grip (even with lube) could cause the skin to become too sensitive. I agree that seeing a Dermatologist might help, but I would also suggest seeing a Urologist. They deal with all kinds of issues regarding the male sexual apparatus & functioning. It's possible a Uro might be familiar with something like this.
This is definitely one of the tougher problems to pin down, but my suggestion would be, don't give up, keep trying till you get an answer. In the meantime, I would also suggest switching to natural fibers for underwear - cotton, etc. - and also try switching lubes to see if that helps. You might want to switch these, then avoid any stimulation (allow for some healing) for 10-14 days, then see if that makes any difference. Good Luck - I'm sure many of us sympathize with your difficulties & hope you find a solution.
Regarding the mystery illness with the high white-cell count, my guess would be that the current issue has nothing to do with it. That was a systematic infection, this is a sensitivity limited to a very specific place. If the severe infection you had years ago was a genital infection like an STD, it might be more of a suspect now, but it's hard to believe that something like, say, legionella would have caused some latent damage that only affects the penis.