What is neural forminal hypertrophic vhanges of the ligamentum flavum bilataterally bulging of intervertebral disc and facet arthropathy?

Anatomy. Not enough space here to write. If you google these things, you will find nice pictures to explain it all. Foramen is the "hole" in the bone where your nerve roots exit. Facets are the joints that hold vertebrae together. Ligamentum flavum is a ligament within the bones that runs down the spinal canal. All of these problems you mention can lead to back pain and nerve related pain.