<s>[INST] Hi doc,About two months ago I had a very bad gum infection on my lower left side of my mouth. I saw my dentist who put me on antibiotic and it eventually cleared. Although my gum still feels funny I don’t have any open wound or anything that causes me pain. Up to date she still cannot find the cause of the gum infection (also you should know prior to the infection I had a dental feeling around that area on two teeth, 3weeks before I go the infection). Now I have an annoying tongue infection or thrush, it’s like a white mark on my tongue. It’s painful and causing me difficulty in eating. I have had that for a month now. I need advice on how to clear this tongue infection or thrush.Thanks Deedee [/INST] Hello and welcome.Thanks for sharing your concern.The gum infection that you have mentioned in your history could be periodontitis.Do you have pockets in your gums?Do you feel pain or bleeding while brushing ?Do you feel soreness in your gums while you get up in the morning?Please answer above details to answer better in this regard.Hope it helps.Thanks.Take care. </s>