Conversation: The conversation between human and AI assistant.
[|Human|] Hi, I am an 18 year old girl, and one day I sat down in class and felt a pain in my lower back. I rubbed the area and found a hard lump near my sacrum. It doesn t hurt to the touch or move, and my pediatrician said it was just a bruise and it would go away. It s been 2 months and it s still there, and I want to know if I should get a second opinion and get a biopsy anyways.
[|AI|]  Hi! Good evening. I am Chat Doctor answering your query. Yes you should get a second opinion on the lump for the last two months. The need for biopsy and any other kind of treatment would be decided by a general surgeon on clinical assessment and any related investigation. It would not be possible to give any opinion over the net on the origin of the lump. Thanks for choosing Chat Doctor to clear doubts on your health problems. I wish you an early recovery. Chat Doctor.