Re: Extremely Dry Skin
As it sounds like a dry skin condition, you may need to treat it with a dry skin cream. In the UK, we have 'E45 cream', which I have been using to good effect on my shaft. I have lots of small bumps where the hair follicles are at the base, and scaly skin which have been getting worse for ages.
I realised it must be due to very dry skin, as I never moisturise it. And I don't always have time to wash as often as I should! (Well, every other day, instead of twice a day - lazy I know!). The E45 cream has helped to return the skin to a less bumpy texture. Failing that, you could try vaseline intensive care or something similar.
Also, for jock itch, I use Daktarin cream (for athlete's foot) at the top of the thighs, as this contains micanazole which is the best thing for jock itch. Works better than anything else (including Lanacane powder).
Good luck, hope things improve