Conversation: The conversation between human and AI assistant.
[|Human|] I noticed yesterday that the back of my babys tongue has a black patch on it and am just wondering what it could be. We have already made an appointment with our pediatrician for tomorrow, but we want to make sure we shouldnt be taking her to emerg tonight.
[|AI|]  Hi. Welcome to Chat Doctor . I have gone through your query and can understand your concern. As per your complaint black discoloration or patch on tongue can be due to a condition known as Black Hairy tongue and can be due to a number of causes like lack of proper oral hygiene maintenance, overgrowth of bacteria or fungus, food debris accumulation, taking medication etc. I would suggest you to maintain a good hygiene status of your infant like cleaning tongue with a tongue scraper, using a soft toothbrush to scrape your tongue, feeding with ample of fluids. It can take a few days to resolve and in case if it does not resolve consult a Periodontist and get evaluated. Hope this information helps. Thanks and regards. Chat Doctor.