For the past few weeks i have been dealing with a few problems regarding my genitals. i am 16, havnt been sexually active so i dont think it could be an STD. the shaft of my penis goes through cycles, it will itch and i mean a very serious itch then the next 2 days the skin will shed off then the next 2 days it seems like it goes away but then it itches and happens all over again. when i first started noticing it the conditions were much worse, the shaft and head of the skin would crack exposing the under part of your skin which was sensitive to the touch then i tried a few things like jock itch spray and i tried some miconazole cream and it would make it better but not go away. by the way i dont masturbate with shampoo thats all the answers i have been getting from the internet