Conversation: The conversation between human and AI assistant.
[|Human|] I have had 4 screws, 2 pins, and a new vertabre put in my lower back 6 years ago in July. I did some yoga classes, and the last one was on Tuesday, and my back started to hurt on Sturday. I started a new job and it intails some lifting. after 4 days of this, while lying on my back, on the floor, I put my hands under my lower back and hurd and felt grinding. Can I have loosend or broken the screw? I m a 67 year old female in very good health.
[|AI|]  Hi welcome to ChatDoctorYes due to yoga by the twisting any or uneven pressure effect could be the cause of displacement of disc. Yes there might be loosened and when it gives pressure to spinal nerve you feel pain. As the unset is sudden and just after a few days of yoga postural movement, so those chances are maximum. But if it had been a long day gradual origin then we should think for others factors like osteoporosis or any spinal growth etc. The exact cause can be found out by CT Scan of whole spine. Thank you