Thanks for writing in.
Going by what you have written, L4 L5 disc is giving you trouble. This means you L5 exiting nerve root
is getting compressed.
Further you have mentioned T1 lumbar is inflammed. There must be a mistake in typing and it looks like you have typed T1 instead of L1.
Any ways looks like steroid
injections are being given to you regularly to keep the pain away.
For complete evaluation, yor present MRI
details are required to know which nerve roots are compressed and to what degree,
The disc pathologies also need to be carefully assessed to explain the best form of treatment and whether conservative treatment can continue or surgery is required.
Hope this helps.