Report says I have L4-5 posterior disc hernia toon indenting the the cal sac in the midline. Also an annular fissure/tear within the protruded portion of the disc. A slight reduction of t2 signal is noted within the disc at this level. What does all this mean.
That means that one of the cartilage discs between your 4th and 5th lumbar vertebrae has undergone some damage and is bulging in the spinal canal. Now whether that causes any symptoms and needs any treatment depends on whether it is compressing any nerves, if I was to be based on that part of the report only I would say that is not the cause, and you do not need any procedure apart from physical therapy in order to strengthen your back muscles to better support the spine. I hope to have been of help.