D12 & L1 vertebra lies at the transition zone of thoracic and lumber area of spine. spine takes curve here from kyphotic to lordotic shape.so it bears a very high load and it is very unstable zone.compression of D12 vertebra makes it more unstable. that causes chronic pain at this region. For pain relief , you could start analgesic such as ibuprofen or sustained release diclofenac. Back strengthening and extension regime muscle exercise give support to the spine at this area and helps in reducing pain and instability. For this you need expert s guidance by rehab specialist and physical therapist. Hope this helps. Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health