White buildup?

Ive had sort of this white stuff that always appears on the inner lips of my vagina but I can't find anything abt it on the internet?? I've had it since I was like 11, and I've had times when I was younger (13 or 14) where I thought I had a uti or a yeast infection but the symptoms went away eventually and now I'm fine, there's just still white stuff. I've kinda just accepted that it's not anything harmful since I've lived with it for so long, but what is it???!!