OK, so this started about a year ago when I was going to Australia for a holiday, I used a public toilet at the airport. When I arrived in Australia and had been there for a day or two and my foreskin was kind of hard to pull back, like the end of my penis was dry, this didn't really phase me as I assumed it was just something to do with puberty(when i arrived back in my home country my penis gave off a slight smell, wasn't anything extremely bad). It has been a year since then and I noticed that my scrotum hair has a skin like substance on the hair follicles.
I want to know if this is anything bad and if I need to see a doctor, please help.
Note : I'm 15 and have had no sexual interaction.