Hello. I'm 19, I had a thin white film and furry on my tongue for several years and it still remains unchanged. It seems like not a coat, just my papillae is white. I can't get rid of it, i can scrape it off but it's still very thin white subsequently. I also have a groove in midline of my tongue and toothmark around the tongue. I have a poor oral dental hygiene history, i used to brush my teeth only 1 time in the morning. It is possibly not related to HIV since I never have sex or use drug before ? I have had it for over 4 years now, if it is HIV, i could be nearly dead right now because i have found that thrush is a sign of the later stage of HIV. Thank you