I have this white residue in my vulva and I'm not sure what it is. It's not like discharge or anything. The best description I can give it is dead skin. I don't have any abnormal symptoms other than this, no itching or bleeding etc. But if I drag my finger across it it'll ball up and come right off. It shows up at the end of the day after I showered that morning. I'd just like to know if you guys think it could be an STD or STI or is this normal???