I am circumsized. I have had an issue with the foreskin that is sort of like blackheads for many years, but I have been embarrassed to bring it to a doctor. There is a whitish substance in my skin that I can squeeze out to a small degree like a blackhead, but not completely. Over time it is building up under my skin. What is it? Is it fungal? Will it require surgery to get out? Is there anything I can do to clear it up without going to a doctor?