My maternal uncle has a problem in his tongue.There is patches or whiteness on tongue in every morning and smells a lot.After toothbrush and clearing tongue patches or dirtyness completely goes away but it again gets their in next morning. The split or tutkh is like rim yellowish on morning but after brush it goes away.He think that it is sign of mouth cancer because he used to eat 5 pan or gutka for 15 years . Now he has give up to eat it but he is under frustrations of getting tongue Cancer. So he started to drink cow urine and start eating roti of mung aata.He is not eating any thing other than this. He is also using a malham cream OMNIGEL ON HIS TONGUE. PLEASE ensure whether it is a symbtom of cancer or not and what to do.