Conversation: The conversation between human and AI assistant.
[|Human|] Hi , I am only 18 years old and for two days now i have this pain in the center of my lower back . When I get up i feel the pain and if i sit for two long . Also when i walk i sorta have to bend my knees and make this strange arch with my body so i can move around .
[|AI|]  Hi, welcome to our site. I am Chat Doctor, MD. Read your query. That is a very significant question and I appreciate your problem. I will try my best to answer your query what you have described is an acute/sudden onset of pain in the back that is restricting the mobility. Since you have not mentioned it, I am assuming that you have not developed any symptoms in the legs yet. I would sincerely suggest an MRI of the LS spine. The MRI would be able to give us the information as to the cause of pain in the bathe medicines can be prescribed accordingly. So do let us know the report of MRI for further suggestion hope this helps you. Inform the reports mentioned above/if any other, so I can be of help further. I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you. Please do understand that some details could be extracted from a detailed history and examination. Please feel free to ask another query. I would be glad to help you. Looking forward to your return query with the details asked so that I can help you further. (If the answer has helped you, please indicate this)Best of luck.