My boyfriend was showing signs of a yellow tongue about 8 days ago, a couple days later I had a bit of yellowness at the back of my tongue, and now it appears white and hairy. I understand these are the tongue papillae that have not shed and grown to long due to bacteria from what I have read. It has been over 8 days and his tongue is still yellow and hairy in appearance and for the last couple days my tongue is white and hairy in appearance. We have used tongue scrapers, hydrogen peroxide, mouthwashes, salt water, vinegar, teeth/tongue brushing. None of these seem to lessen the appearance and it can not be brushed off. How long will this take to go away, should we see a dentist, and what other treatments would you suggest?