Conversation: The conversation between human and AI assistant.
[|Human|] My daughter is 13 and real slim about 2 weeks ago she notice she had a lump just below her left rib in the front. At time it is a little sore but nothing to bad. Took her to er and was told it was a muscle. X ray was taken but didnt find anything. While standing if she twist her body you can feel it but once ahe straight again u can see it and feel it. What can this be.
[|AI|]  Hi, Dear,Thanks for the query to Chat Doctor. I studied your query in depth. I feel concerned about it. In my opinion your daughter has a third nipple or a Supernumerary nipple below the normal nipple on left side / or may be puberty change of late occurence-Normal being 9-11 yrs. Hope you would solve your query. Please contact again, and I would love to attend your queries promptly. Have a good time.