I have had a white/ yellow coated tongue for around 6 months to a year now. I get it every morning and evening and it usually returns in the day too. I have to brush it rigorously to remove it. I have a history of IBS. I haven't exercised in about a year and have a desk job. I weigh around 200 lbs and I am 28 years old. I often get small painful sores on the side of my tongue which feel as though there is a small cut there i.e. I get a small shart pain when it runs along my teeth.