I previously had a burst fracture of the L3 and L4 and had them fused 20 years ago.  Today I was lifting a heavy object and felt a hard pop from the fused area and went down in a lot of pain.  I took a couple hydro and made it to bed.  Do you think I re broke my back? Or simple sprain in extreme pain right now
Sudden pain during heavy weight lifting can be due to disc prolapse also. Initially get an x-ray done to rule out any fracture...but before that strict bed rest and avoid forward bending activities. Get x-ray done later MRI if needed