My tongue looks awful - it is black and discoloured. This has been an ongoing problem and it s actually getting worse! I ve visited my GP tonight who, other than prescribing an oral gel (Daktarin), says that there is no other treatment. I m happy to try the Daktarin in case there is any oral thrush present, but I m so embarrassed about it - I dont want to laugh or smile because my tongue looks absolutely dreadful. I have taken background dose of antibiotics - Erythromycin 500mg twice per day, for a skin condition for about 13 - 15 years now, and I know these can contribute to the cause. Can you advise of any treatments please? Someone said fresh pineapple works as it contains salycilic acid?